Features:1. Arbitrary Angle of 360 ° around, as far as 10 meters above the manipulation of the distance.2. Unique intelligent circuit management design, so that the mouse more electricity.3. System requirements: for Windows / XP / Vista / 7 / Linux /and for MAC operating system.4. 3 million times button service life, better click effect, improved comfort, no noise, quieter.5. Adopt the latest infrared light technology.Specifications:Color: SilverPhotoelectric Resolution: 1200dpi (dpi)Interface: USBKey Number: 6 (key)--Left and right buttons, pulleys (can be pressed), forward and backward keys (for browsing web pages and folders), keys to change resolution (under pulleys)Battery: AAA*2 (without battery)Wireless Transmission Distance: 10mWireless Carrier Frequency: 2402MHz-2480MHzWireless Working Channels: 16, automatic frequency hoppingRated Working Current: 8-15mA@3VKey Stroke: 0.8mmPress Force: 60-70 ± 10gButton Lifetime: 3 million timesSize: Approx. 10 * 6 * 3.5 cm / 3.9 * 2.4 * 1.4 inWeight: 53 gPackage list:1 x Mouse1 x USB Receiver