Special Breathing LED Light 7 different color changes randomly while in use, offering soothing ambient lighting, creating cool and fancy atmosphere for working and gaming. Note: It can be turn off by bottom light switch if you do not need it. Silent and Durable Click Soundless design for left and right button make you work or play in a quiet environment, won?t disturb others. Passed 5,000,000 times keystroke test to make sure extra durability. Change the Sensibility of Mouse Freely You are free to adjust the mouse sensitivity to match your activity. 3 DPI levels available (800-1600-2400).Ergonomic Design The heightened mouse cover with matting finish fits your palm perfectly. The symmetrical design allows it to fit both hands.Plug and PlayCome with a space-saving USB receiver that can be plugged into your computer's USB port when in use. The USB receiver at the bottom of the mouse. 6 Buttons DesignLeft, right, scroll wheel, DPI switch, forward and backward is more convenient to operate. Quick thumb-side buttons enables you to go to the previous or next page quickly.How to use1. Charge the mouse for about 2 hours before using it for the first time.2. Take the dongle out, which is stored under the back of the mouse.3. Insert the dongle into the USB port of your PC.4. Turn on the mouse, the switch is at the bottom of the mouse.5. Allow a few seconds for installing, no action needed, just wait. Then you can use it.Note1. It's out of power if the mouse cursor moves slowly or stop moving.2. The blue light beside the scroll wheel will be on while charging, and then goes off when the mouse is fully charged. 3. Please use computer's USB interface to charging the wireless mouse.[The charging current of the mobile phone charger or other chargers is large, which will burn the charging IC and reduce the battery life and the mouse life.]