1、Adopt 2.4GHz wireless transmission technology, the transmission distance up to 10m. 2、The mouse fits the ergonomic design, naturally fits the palm and fingers, reduces your discomfort when using the mouse, remits and prevents carpal tunnel syndrome, bid farewell to the "mouse hand". 3、Strong optical engine provides accurate click and quick response, more convenient to use. 4、The mouse provides 3 adjustable DPI(800-1200-1600DPI), you can switch easily via the DPI button. Smooth surface brings comfortable hand feel. 5、Non-slip wheel provides moderate resistance and smooth rolling, better improves working efficiency and fully meets the game/office requirements. Features: Adopt 2.4GHz wireless transmission technology, the transmission distance up to 10m. The mouse fits the ergonomic design, naturally fits the palm and fingers, reduces your discomfort when using the mouse, remits and prevents carpal tunnel syndrome, bid farewell to the "mouse hand". Strong optical engine provides accurate click and quick response, more convenient to use. The mouse provides 3 adjustable DPI(800-1200-1600DPI), you can switch easily via the DPI button. Smooth surface brings comfortable hand feel. Non-slip wheel provides moderate resistance and smooth rolling, better improves working efficiency and fully meets the game/office requirements. Specification: Item name: Wireless vertical mouse Color: Black+Silver Material: ABS Transmission distance: Up to 10m Number of keys: 6 DPI: 800-1200-1600DPI Battery capacity: 350mAh Key life: About 5 million times Item weight: Approx.92g /3.25oz Package size: 13 * 9.3 * 7.6cm /5.12 * 3.66 * 2.99in(L * W * H) Package weight: 146g /5.15oz Packing list: 1 * Wireless Vertical Mouse 1 * USB Receiver 1 * USB Cable 1 * Wireless Vertical Mouse 1 * USB Receiver 1 * USB Cable