SROCKER M302 Ultra-thin Wireless Bluetooth 3.0 Rechargeable Silent Click Optical Mouse/Mice with 4 Buttons and Built-in 830mAh Battery Adjustable DPI for Bluetooth Devices (Black) Ultra-thin: Lightweight, compact design makes it perfect for use at home, office or on-the-go. Slim design makes it perfectly for travel, easy to put in your laptop bag or pockets. Pure colors make your computer look fresh and out-going. Bluetooth Connection: It can connect to any Bluetooth-compatible PC, laptop, or Android tablet and iPad(you need to jailbreak your iPad). Intelligent connectivity, no code required. 3.0 interface is backward compatible with all Bluetooth versions. Power Revolution: With built-in 830mAh polymer battery and rechargeable USB cable, you don't worry about changing battery often, which is environment friendly. It will enter the sleep mode when you don't use it about 10 minutes. The auto sleep function can save and prolong battery life. On/off switch on the bottom helps to conserve power. Silent Click: We adopt the unique silent technology and high-ranking mute shrapnels in all mouse buttons. No click sound design makes you have a quiet working environment and avoid disturbing others. At night, it can keep your family have a good sleep and also keep you do work seriously. Adjustable DPI: 3 DPI levels (1000/1200/1600) can make you select your preferred cursor speed. 3 DPI levels suit both ordinary and gaming needs. Optical laser allows for quick response, precise movement, and smoother tracking.