Ergonomic Vertical Design provides natural grip and wrist position minimizing wrist pain during long hours of use with right-handed orientation for maximum comfort 2.4GHz RF Wireless Technology with 30 ft range featuring on/off switch to conserve battery power and low battery indicator included with 2 AAA batteries Adjustable 3 Level DPI Switch allows switching between 800 DPI green 1600 DPI blue and 2400 DPI red for precision and accuracy across different computer tasks 6 Programmable Buttons including left and right click back and forward navigation DPI switch scroll wheel and middle button for enhanced productivity Customizable Programmable Driver enables adjustment of colors blinking speed macro assignments custom DPI settings up to 4800 DPI and button reprogramming for personalized experience