WHY DOES THIS PIECE OF GARBAGE NOT WORK
CHANGE BATTERIES, CLEAN EYE, NOTHING MAKES THIS JUNK PERFORM AS IT SHOULD
There could be several things. Bad USB port, bad receiver, bad _________, could just be defective. Might be incompatible with whatever device you're using it with or the software isn't installed properly. Maybe the surface your using it on isn't recognizable by the sensor. Return it and get another one. I have one and it works great.