Rechargeable: Built-in rechargeable battery, no need change battery. Special soundless design for the right and left buttons, won't disturb others. Colorful Light: 7 different color changes randomly while in use, offering soothing lighting, creating cool and fancy atmosphere for work and play. Energy Saving: The mouse will be in sleep mode in 8 mins of inactivity. And the LED light can be turned off by the bottom light switch. Slim & Portable: About 4.4 x 2.2 x 0.79 inches, Perfect for travelling carry and it can be easily put into your laptop bag and ultra-space saving. Widely Compatibility: Works with Windows 2000/XP/7/8/10/Vista, Mac with USB port or Type C port. Suitable for homes, offices, travel and more.