Features: 2.4G+BT3.0+BT5.0 three-mode wireless connection, stable signal, fast transmission. Ergonomic vertical design, the mouse fits the palm and fingers, reduces discomfort when using, bid farewell to the "mouse hand". 3-gear adjustable DPI(1000-1600-2400DPI), easy to switch, adapt to a wide range of material surfaces, accurate position. Designed with independent forward backward buttons, you can use the thumb to facilitate "forward" and "backward" operations, easy to browse folders and web pages. Bionic tire type roller, comfortable oblique texture design, increase friction with the fingers, comfortable to use. Built-in 700mAh rechargeable lithium battery, low power consumption, long endurance time. Specification: Brand: ZELOTES Model: F-35B Button number: 6 Tracking technology: Optical Connection mode: 2.4G+BT3.0+BT5.0 Effective distance: 10m(barrier-free) DPI: 1000-1600-2400DPI Frequency: 2405MHz-2476MHz Rate of return: 250Hz(2.4G), 90Hz(BT) Button life: 3 million times Battery capacity: 700mAh Working voltage/current: 3.7V 3mA Item size: 11 * 7.5 * 7.2cm /4.33 * 2.95 * 2.83in Item weight: Approx. 115g /4.06oz Packing list: 1 * Mouse 1 * Charging cable 1 * User manual