TECKNET Bluetooth Wireless Mouse 4800 DPI

I ordered two of these and one works flawlessly, but the other goes to sleep and drops connection to computer. When I move it, it wakes up, but after a minute of use just stops working. I have to go to my worn-out Logitech mouse which is what I was trying to replace.
One is great and the other is garbage!

I mean sometimes it works perfectly but other times it just doesnt react to movement. like the cursor just wont move. this could be due to my surface but ive used it on multiple surfaces (mousepad, wooden desk, paper, the hard cover they put on notebooks) and its very unreliably on each surface. its a cheap mouse so i cant really complain but i think it still should be said. 2/5

I tried on a 3 different computers and none of them recognize the device.

Excellent bluetooth mouse

Can't stop the mouse from sleeping