Q&A <br> <br> <br> <br> <br> <br> Q1. After I turn on the mouse, the red light flash and off ? <br> <br> <br> <br> <br> <br> A1. Please put USB receiver in computer when you text the mouse. Because only when mouse matched the USB receiver, it will work. <br> <br> <br> <br> <br> <br> &nbsp; <br> <br> <br> <br> <br> <br> Q2. What is the different between&nbsp;Soundand&nbsp;Silent&nbsp;? <br> <br> <br> <br> <br> <br> A2.&nbsp;&nbsp;Silent version is mute version,&nbsp; it does not have sound when you press left and right button.&nbsp; <br> <br> <br> <br> <br> <br> <br> <br> &nbsp; <br> <br> Specifications: <br> <br> Item Name: 2.4G Wireless Mouse <br> <br> Buttons: 4 Buttons <br> <br> Ajustable DPI Switch: 800-2000DPI <br> <br> Verison: Silent(Mute) / Sound <br> <br> Color: Black / Gray / Green / Red <br> <br> WiFi Range: 10M <br> <br> Battery: 2 * AAA battery 1.5V 【NOT work with 1.2V】 (Not Included) <br> <br> Key Life: 10 million times <br> <br> Size: 115*80*40mm <br> <br> Compatible : Windows / VISTA / ... <br> <br> <br> <br> Package Included: <br> <br> 1 x Wireless Mouse( Without Battery ) <br> <br> 1 x USB Receiver <br> &nbsp; <br> <br> &nbsp;