GearZone 21v Cordless Staple Gun Brad Nailer with Fast Charger and 2pcs Lithium Battery 1000pcs Straight Nails and 1000pcs Code Nails Packed in Tool Case

First of all this is a very heavy tool Secondly is doesn't work. Says it needs full charge to work properly and I let it charge for 4 hours. Used my own higher quality 30mm brad nails from Makita as the ones supplied don't go in to wood 30mm thick, pine or plywood. Was told to push with 2 hands and still nothing. Works sometimes and other times it leaves 5mm sticking out and have to manually hammer it in so no point. No indicator light on the battery to see if it needs charging or when it's ready. It's a pity cause it feels solid.