Mice & Trackballs Features:1. Engineering design, stylish appearance and comfortable feel.2. Optical positioning, positioning is more accurate.3. Smart mini receiver, automatic connection, no need for complicated code matching.4. Up to 16 million ID coding designs to enhance the anti-interference characteristics of the mouse;5.Any 360 around the use angle, as far as the control distance of about 10 meters;6. Circuit management design, making the mouse more power-saving;7. Resolution 800-1600dpi adjustable frequency, enjoy your wirele free space;8. System requirements: Windows2000/XP/Vista/Linux/7/ and MAC operating system9: Silent design of left and right keys, more quiet. Specification: 1. Wirele transmiion distance: about 10m2. Wirele carrier frequency: 2402MHz-2480MHz3. Wirele working channels: 16, automatic frequency hopping4. Key stroke: 0.8mm6. Keystroke force: 60-7010g7. Key life times: 3 million times Package Included: 1 x Wirele Mouse1 x USB Receiver1 x Charging Cable