SROCKER M301 Ultra-thin 2.4GHz Wireless Soundless Rechargeable Optical Mouse/Mice Silent Click with Built-in 830mAh Battery and Nano USB Receiver, 4 Buttons for Laptop/PC/Mac (Blue) 2.4GHz wireless: Adopts 2.4GHz wireless technology, which is more secure and precise than the traditional FM radio system. The wireless distance is up to 10 meters to break the bondage of a wired mouse and to move freely. Built-in lithium battery and DPI: High quality lithium battery with 830mAh capacity, which can be used for about 3 months after a full charge. It can enter into a sleep mode automatically to save the battery, and only need one click to wake it up. 3 DPI levels (1000/1200/1600) can make you select your preferred cursor speed. Ergonomic design: The mouse is very cleverly designed to be ergonomic and very comfortable to the natural contour of your hand, which fits both right and left hands perfectly. Ultra-thin and soundless: Lightweight, compact design makes it perfect for use at home and office. Slim design makes it perfectly for travel, easy to put in your laptop bag or even pockets. 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. Stylish appearance: Adopts stoving vanish technology, which can paint more even and firm than the traditional paint spraying. The unique colors such as pink, blue and yellowish green can make you feel fresh in your work.