Product Feature Top level wireless gaming mouse solution 2.4G two-way transmission distance can reach to 10 meters Low power indicator for alarm 5 Adjustable CPI level 800/1200/1600/2000/2400,default as 1200 CPI Multi-stage power saving mode disign Product Specifications Product size: L=123.5mm * W=71mm * H=39mm Weight: About 80g(Without battery) Buttons: 7 buttons with scroll wheel Working Voltage: 1.5V Working Current: 6.5mA/9mA(LED light) Power supply: 1 x AA battery Required(Battery not included) Key stretch:70±10g CPI: 800/1200/1600/2000/2400 Scanning Speed: 30IPS Transmission Distance: 10m Switch Life: 5 million cycle Cordless Carrier Frequency: 2402MHz-2480MHz USB Interface: USB 2.0, also compatible with USB 1.1 O.S requirement: Windows XP/Vista/Win 7/Win 8/Mac OS x/Linux Installation: 1. Find the wireless mouse and Nano receiver in package. 2. Plug Nano receiver to USB port on PC 3. 1pc AA battery into Mouse body Properly(Battery not included in package) 4. LED indicator will keep flash for few seconds,the Mouse is ready to work.