---
product_id: 625394282
title: "X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51"
brand: "x-sense"
price: "€ 23.94"
currency: EUR
in_stock: true
reviews_count: 7
category: "X Sense"
url: https://www.desertcart.ie/products/625394282-x-sense-smart-mailbox-alarm-requires-sbs50-base-station-wireless
store_origin: IE
region: Ireland
---

# 2.4 GHz long-range Wi-Fi 4-year battery life IP65 waterproof durability X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51

**Brand:** x-sense
**Price:** € 23.94
**Availability:** ✅ In Stock

## Summary

> 📬 Stay ahead of your mail game with smart alerts that keep you connected and in control!

## Quick Answers

- **What is this?** X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 by x-sense
- **How much does it cost?** € 23.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/625394282-x-sense-smart-mailbox-alarm-requires-sbs50-base-station-wireless)

## Best For

- x-sense enthusiasts

## Why This Product

- Trusted x-sense brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-User Sharing:** Share mailbox alerts seamlessly with family or roommates via the X-Sense app for total household connectivity.
- • **Instant Mail Alerts:** Get real-time push notifications the moment your mail arrives—never miss a delivery again.
- • **All-Weather Reliability:** Built to withstand extreme temperatures and weather with IP65 waterproof rating and UV-resistant shell.
- • **Effortless Wireless Setup:** 100% wire-free installation with included double-sided tape and intuitive app guidance.
- • **Versatile Mailbox Compatibility:** Sleek, compact design fits curbside, wall mount, slot, and cluster mailboxes—perfect for any home.

## Overview

The X-Sense Smart Mailbox Alarm (SMA51) is a wireless, app-connected sensor that sends instant mail delivery alerts via 2.4 GHz Wi-Fi through the SBS50 base station (sold separately). Designed for easy installation and long-range transmission, it supports multiple mailbox types and offers a 4-year battery life. With IP65 waterproofing and UV-resistant materials, it ensures reliable performance in all weather conditions. Multi-user sharing and customizable alerts make it ideal for modern households seeking convenience and security.

## Description

desertcart.com: X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 : Tools & Home Improvement

Review: Awesome covi - The X-Sense Smart Mailbox Alarm System is a cutting-edge solution for anyone seeking a blend of convenience and security in managing their mail. With real-time push notifications delivered directly to your mobile device, you'll never miss a mail delivery again. Whether you use a curbside, wall-mounted, or cluster mailbox, this versatile system integrates effortlessly into various setups. One of its most impressive features is the long-distance transmission capability, ensuring a strong and reliable connection to the base station. This means you’ll receive timely alerts, even from a considerable distance. The system’s installation is refreshingly simple, requiring no wiring—just the included double-sided tape and user-friendly in-app guidance. Built to last, the X-Sense Mailbox Alarm boasts an IP65 waterproof rating and operates efficiently in extreme temperatures, from 14°F to 140°F. Its durable ASA shell and silicone seal protect against UV damage, guaranteeing longevity even in harsh weather conditions. The replaceable battery, designed to last up to four years with typical usage, further underscores its practicality. Additionally, the system supports multi-user sharing, allowing everyone in your household to stay informed. This thoughtful feature adds to its appeal for families or shared living arrangements. In summary, the X-Sense Smart Mailbox Alarm System combines durability, functionality, and ease of use. Its innovative design not only streamlines mail management but also provides peace of mind, making it a standout choice for modern households.
Review: A useful, convenient product. We recommend it. - We bought this mailbox alarm at the same time we got water leak detectors from X-Sense. We bought the set of leak detectors without the base station and use the station included with the mailbox alarm for everything. It all works well together. We particularly like the fact that the mailbox alarm saves us making unnecessary trips out of the mailbox just to discover the mail has not yet been delivered. It also reduces the chance of mail theft. When the letter carrier opens the mailbox, we get a chime to notify us, so we can pick it up right away. Our mailbox is not too far away, but for anyone who has a long driveway or who lives in an apartment building, this would be a must have. Just remember to press the reset button on the base station after you’ve picked up the mail. Set up was easy. The only potential issue I could see is if your Wi-Fi is not strong enough to reach your mailbox, since it all works over your Wi-Fi system.

## Features

- Note: Compatible only with 2.4 GHz Wi-Fi (not 5 GHz). Connects to the X-Sense Home Security App via the SBS50 base station (not included)
- Real-Time Push Alerts & Multi-User Sharing: The moment your mail arrives, you'll receive an instant app push alert; manage various features from your phone, such as device sharing, mail reminder, one-button silence, adjusting volume up to 100 dB, and ringtone selection
- Long-Distance Transmission, Accurate Detection: With extensive coverage, the smart mailbox alarm maintains a strong and reliable connection to the base station (not included) via a 2.4 GHz Wi-Fi network, and promptly sends notifications to your phone
- Compatibility with Various Mailbox Types: This mailbox alarm is designed with a sleek and compact profile; compatible with curbside/post mount, wall mount, slot type, and cluster type mailboxes; not suitable for mail slots without lids
- Extra Long Standby, Easy Setup: The replaceable battery offers a long 4-year lifespan based on 5 daily triggers; the alarm is 100% wire-free and easy to install using the double-sided tape included; following the in-app instructions, simply add it to the X-Sense app in seconds
- Built for All-Weather Durability: With its IP65 waterproof rating and an operating temperature range of 14–140°F (-10–60°C), this wireless mailbox alarm operates reliably even in extreme weather; ASA shell and silicone seal prevent fading caused by sunlight and UV rays
- Customize Your Home Safety System: Includes 1 mailbox alarm (requires SBS50 base station, not included); each base station can connect up to 50 X-Sense devices, providing complete coverage for both your indoor and outdoor properties; customize your device names for easy location and management as needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CYZKRH49 |
| Batteries | 1 CR2 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium |
| Battery Description | Lithium |
| Best Sellers Rank | #143,566 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #105 in Post-Mount Mailboxes |
| Control Method | App |
| Customer Reviews | 4.3 4.3 out of 5 stars (132) |
| Date First Available | March 25, 2024 |
| Description Pile | Lithium |
| Included Components | 1 Smart Mailbox Alarm (Base Station Required) |
| Item Weight | 2.08 ounces |
| Item model number | SMA51 |
| Manufacturer | X-SENSE |
| Mounting Type | Wall Mount |
| Number of Batteries | 1 CR2 batteries required. (included) |
| Part Number | X-SENSE |
| Product Dimensions | 1.65 x 1.26 x 4.21 inches |
| Sensor Technology | Infrared Sensor |
| Smart Home Compatibility | Smart Home Compatible |
| Style | Only 1 Alarm (Base Station Required) |
| Voltage | 3 Volts |

## Product Details

- **Brand:** X-Sense
- **Color:** Black
- **Compatible Devices:** Smartphone
- **Power Source:** Battery Powered
- **Product Dimensions:** 3.91"L x 1.06"W x 1.02"H

## Images

![X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - Image 1](https://m.media-amazon.com/images/I/71d+6EvSzML.jpg)
![X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - Image 2](https://m.media-amazon.com/images/I/617W2EqMrnL.jpg)
![X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - Image 3](https://m.media-amazon.com/images/I/61BzIWlfsLL.jpg)
![X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - Image 4](https://m.media-amazon.com/images/I/61ARKm9QQxL.jpg)
![X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - Image 5](https://m.media-amazon.com/images/I/61hPCn-zjxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome covi
*by M***N on March 9, 2025*

The X-Sense Smart Mailbox Alarm System is a cutting-edge solution for anyone seeking a blend of convenience and security in managing their mail. With real-time push notifications delivered directly to your mobile device, you'll never miss a mail delivery again. Whether you use a curbside, wall-mounted, or cluster mailbox, this versatile system integrates effortlessly into various setups. One of its most impressive features is the long-distance transmission capability, ensuring a strong and reliable connection to the base station. This means you’ll receive timely alerts, even from a considerable distance. The system’s installation is refreshingly simple, requiring no wiring—just the included double-sided tape and user-friendly in-app guidance. Built to last, the X-Sense Mailbox Alarm boasts an IP65 waterproof rating and operates efficiently in extreme temperatures, from 14°F to 140°F. Its durable ASA shell and silicone seal protect against UV damage, guaranteeing longevity even in harsh weather conditions. The replaceable battery, designed to last up to four years with typical usage, further underscores its practicality. Additionally, the system supports multi-user sharing, allowing everyone in your household to stay informed. This thoughtful feature adds to its appeal for families or shared living arrangements. In summary, the X-Sense Smart Mailbox Alarm System combines durability, functionality, and ease of use. Its innovative design not only streamlines mail management but also provides peace of mind, making it a standout choice for modern households.

### ⭐⭐⭐⭐⭐ A useful, convenient product. We recommend it.
*by S***L on February 11, 2026*

We bought this mailbox alarm at the same time we got water leak detectors from X-Sense. We bought the set of leak detectors without the base station and use the station included with the mailbox alarm for everything. It all works well together. We particularly like the fact that the mailbox alarm saves us making unnecessary trips out of the mailbox just to discover the mail has not yet been delivered. It also reduces the chance of mail theft. When the letter carrier opens the mailbox, we get a chime to notify us, so we can pick it up right away. Our mailbox is not too far away, but for anyone who has a long driveway or who lives in an apartment building, this would be a must have. Just remember to press the reset button on the base station after you’ve picked up the mail. Set up was easy. The only potential issue I could see is if your Wi-Fi is not strong enough to reach your mailbox, since it all works over your Wi-Fi system.

### ⭐⭐⭐⭐⭐ Great range, needs better adhesive and more customization
*by S***S on August 16, 2024*

Great range from the base station. My mailbox is over 500 feet away and the signal has to deal with my brick house. (It probably goes through a window but still...). My Wi-Fi doesn't reach the mailbox but the base station connects to the mailbox alarm with no problem. The unit consists of two parts. There's the sensor itself which detects light and houses a battery, and that clips on to a mounting bracket that you put on the inside of the door of your standard curb line mailbox. The mounting bracket is attached to the door with a peel and stick adhesive. Unfortunately that adhesive will not hold up to very hot temperatures particularly if your mailbox is in the sun. The temperature went above 90 and I started getting false alarms because the detector was sliding around and detecting subtle changes in light. This isn't hard to fix; you just need and adhesive that can withstand high temperatures. I reattached the mounting bracket with silicone sealant design for fireplace components. Definitely overkill but it was a cheap fix and it got the job done. I'm not sure if that sealant is designed to stand up to winter temperatures but I guess I'll find out in a few months. The bottom line is that you're going to have to think about how you attach the mounting bracket in your climate. The X-Sense app is good in the sense that it's easy to understand and it works. A lot of apps for these types of gizmos are terrible but overall I'm impressed with X-Sense. But it doesn't have much in the way of customization. And that means that whenever the mailbox is opened the alarm goes off. So you're triggering your own alarm every time you open the mailbox to get the mail. There should be a setting that allows the alarm to be triggered only once a day, or mutes it for a while after it initially goes off, or turns it off completely at certain times of day. But overall it works, and the one inconvenience that threatened its usefulness was solved with a higher quality adhesive.

## Frequently Bought Together

- X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51
- X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11
- X-Sense Smart Home Security System, Wireless Home Alarm System 8-Piece Kit, Supports Mobile App Alerts, Compatible with Alexa, Includes 1 Base Station, 4 Door Sensors, 2 Motion Sensors, 1 Keypad, AS08

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-14*