Feature: 1. HIGH ACCURACY: USB mouse adopts high precise sensing technology, accurate optical sensor, smoothly and accurate operation, suitable for office, study and entertainment. 2. ADJUSTABLE DPI: Optical mouse gaming adjustable DPI, adjustable sensitivity to meet different needs, front and back button design, more convenient operation. 3. ERGONOMIC DESIGN: Computer mouse ergonomic design, in line with the hand curve, comfortable to hold, reduce hand fatigue. 4. 500MAH BATTERY: High performance mouse, realize wireless connection, convenient charging design, 500 mAh high capacity battery, long lasting life. 5. MULTI PURPOSE: Wireless mouse supports a variety of operating systems, suitable for PC, laptop, easy to connect multiple devices, enhance work efficiency. Specification: Item Type: Wireless Mouse Optical Material: ABS Battery Type: Lithium Battery 500mAh (Ship with Inbuilt Battery) Interface: USB/ Wireless Transmission Frequency: 2.4GHz/ Optical Resolution: 1600dpi Number of keys: 4 Scroll Wheel Direction: Four Way Scroll Wheel Size: Approx. 63 x 35 x 101mm / 2.48 x 1.38 x 3.98in Package List: 1 x Wireless Mouse Optical (Ship with Inbuilt Battery) 1 x USB Signal Interface