A1. Please put USB receiver in computer when you text the mouse. Because only when mouse matched the USB receiver, it will work.
Q2. What is the different between Soundand Silent ?
A2. when you press the button of mute mouse , the mute one make less noise than sound version
Buttons: 4 Buttons
Ajustable DPI Switch: 800-2000DPI
Verison: Silent(Mute) / Sound
Color: Black / Gray / Green / Red
WiFi Range: 10M
Battery: 2 * AAA battery 1.5V 【NOT work with 1.2V】 (Not Included)
Key Life: 10 million times
Compatible : Windows / VISTA / MAC...
1 x USB Receiver