TENMOS K6 Wireless Gaming Mouse, Rechargeable Silent LED Optical Computer Mice with USB Receiver, 3 Adjustable DPI Level and 6 Buttons, Auto Sleeping Compatible Laptop/PC/Notebook (Red Light) Rechargeable Wireless Mouse: Built-in rechargeable battery, with a charging cable. No need to change batteries. (Battery life may vary based on user and computing conditions.) Its widely compatible with laptop/ computer that with USB port, support Windows XP, Windows Vista, Win7/8,10, Mac OS system. Super Silent Click: Special soundless design for the right and left buttons, make you concentrate on working or playing games without disturbing others. Stable & Accurate Tracking: 2.4GHz wireless mouse, up to 10 meters ultra long-distance and stable wireless transmission. 1000/1600/2400 CPI free switch to meet your needs with high precision. The higher CPI, the faster the cursor on your screen will move. Energy Saving: At the bottom have 2 ON/OFF button, top one for controlling the mouse, below one is LED light switch, you can turn off the light at any time to help save battery. Unique Design: Ergonomic shape and smooth touching make it be comfortable in your hand. Soothing light lights up the mouse in dark, it can be turned off by the bottom light switch. Pls charge the mouse for about 2 hours before first time use it. When you do not use it over 8 minutes, the mouse will enter into sleeping mode,you can click any button to wake  it up. This is a rechargeable mouse, no need change battery.Plug and play, no other driver required. It&#039;s out of power if the mouse cursor moves slowly or stop moving. The blue light beside the scroll wheel will be on while charging, and then goes off when the mouse is fully charged. CPI:2400/1600/1000 Battery: lithium battery Battery capacity: 600mAh Interface Type: USB Working Type: Optical Wireless Technology: 2.4GHz Buttons: 5 Buttons, 1 scroll wheel 1*Wireless mouse 1*battery(built-in) 1*USB receiver(stored in the bottom of mouse) 1*USB charging cable 1*English manual