2.4Ghz Custom Vertical Ergonomic Mouse Wireless Mice Comfort Grip Design to Reduce Muscle Strain. 2.4G Technical SPEC 1. RF:2402MHz-2480MHz 2. RF operation channel:16,automatic frequency hopping 3. Rated voltage:1.5V 4. Rated current:12-20mA 5. Max. Acceleration:14ft/Sec System Requirement: 1. Compatible with Windows 2000/XP/ME/NT/Win 7, 8, 10/MAC operation system 2. One USB available port Product Feature: 1. 2.4GHz digital wireless transmission,operation distance is up to 10 meters. 2. Built-in mouse memory,no recoding is needed after battery replacement. 3. Intelligent Power-saving technology,the service life of one alkaline battery is up to six months 4. Intelligent connectivity,no need to code,plug-and-play. 5. Ergonomically designed,comfort grip. 6. Dormant class control and more power-saving hibernation connectionless. 7. 1200-2400-3200dpi adjustable 8. Ergonomic Vertical Design