【Rechargeable Silent Mouse】: Built-in rechargeable battery, no need change battery.it can be easily charged using the included USB cable. 2 hours charging, you can use it for 7-15 days. Special soundless design for the right and left buttons, Noiseless click, no worrying about disturbing others beside you, let you concentrate on work. 【Colorful Light】: 7 different color changes randomly while in use, offering soothing lighting, creating cool and fancy atmosphere for work and play.This wireless mouse Bluetooth with lights can give you more fun during office time. 【Energy Saving】: The mouse will be in sleep mode in 5 mins of inactivity. You can choose use the 2.4G wireless mouse when the mouse button switch is on the 2.4G mode or connect your laptop's Bluetooth to use the Bluetooth mouse, easy to switch suitable for any occasion.