iSCAN 1050DPI Portable Handheld Wireless WIFI Scanner A4 Book Document Handyscan

Works brilliantly. The output file JPEG images from a full colour A4 size scan set to FINE quality 1050dpi are just over 10Mb each, all having a fixed 7584 pixels horizontal width whilst the height varies depending exactly how far your hand travelled before stopping the scan, but typically getting up to 10992 pixels. So, if this were a digital camera with 7584 x 10992 pixel images it would be 83 megapixels!!! That's very impressive high resolution indeed.Watch out for picking up bits of dust, or strands of hair / fluff getting caught on the scanner's lens underneath as you roll over many sheets of paper, because these will cause a tiny dark speck being dragged along the scan to look like a thin vertical dark line. Keep the lens clean (blow away dust) and it works great.If you scan from top of page down to bottom, pulling horizontal scanner slowly downwards toward you, the image looks correct.If you start at the page bottom and push it upwards to the top, the scanner realizes that it's roller wheels are running "backwards" and it still works by correcting for this, but the resulting JPEG image file is merely upside down, ie. 180 degree rotated. It is not mirror image flipped, so quite easy to correct in Windows by rotating the image.However, occasionally the scanner did go wrong on normal downward scans (maybe wheels stuttered slightly and it couldn't decide which way it was rolling and selected the wrong direction to process electronically) and the image looks mirror-image flipped, which is useless, although you could fix it in Photoshop. Anyhow, since you can check to see what happened on the iScan's very handy LCD screen straightaway, it's no problem to just do it again and get correct output. It can be a little temperamental like that if you're not very controlled with your motion.I would personally NOT buy another cheaper scanner without the LCD preview screen. It's so useful when you're away from your computer. There are other models that are cheaper, like £30 or so, but only 900dpi (not much worse than 1050 dpi) but lacking the LCD preview screen is dealbreaker IMHO.Minor issue - on some large file size colour files, iScan refuses to allow zoom in afterwards on LCD screen preview. Mostly works okay. Otherwise the zoom up to 8x is ideal for checking edges of page were captured, although fiddly to navigate with the buttons. 8x zoom on the LCD looks about the same as real life subject size.Dragging scanner downwards in a dead straight line is not always easy, and sometimes the page looks a bit skewed if you're not careful, even if you do it slowly, you can still drift off by 5mm by the bottom of the page, but that's your human fault not the scanner hardware. Photoshop Skew transform filter is good at correcting these slight parallelogram shapes that can result - we're talking very small amounts only, and likewise rotating the image maybe 0.5 degrees to correct sometimes. Fortunately there's gallons of resolution headroom for that type of processing with the 83 megapixel image!USB charging from any 5 volt USB charge socket works fine, it comes with the USB lead, but no power adapter. There is a red LED on the top to indicate charging which goes green when full after about 2 hours.I bought one of these on ebay for £49.58, which came with a fabric sleeve case, but I needed to buy a separate 32GB micro SD card which it recognised perfectly, and formatted to FAT32.Great product, definitely recommended, and useful to travel around with you, rather than a desktop flatbed scanner always being tied to a mains socket and your PC hooked up. This can go anywhere!