2.4G Wireless : Connection through 2.4GHz USB Receiver. Silent Click : Special soundless design for the right and left buttons, make you concentrate on working or playing games without disturbing others.DPI 1600 to meet your needs with high precision. Advanced Optical Tracking Technology ensures greater sensitivity for precise tracking on a wide range of surfaces. Slim and Ergonomic Design: Symmetric and ergonomic design makes this wireless mouse fit for both left and right hand, Naturally curved grip of the mouse makes comfortably and perfectly in your hands, avoids hand fatigue for long term use. Slim and portable design makes the mouse can be used anywhere, a great travel mouse. Widely Compatibility: Bluetooth mode works with Windows / Android / MAC OS system. Easy to pair and connect, and do not occupy any USB ports. 2.7GHz mode works with laptop, desktop or any device with USB port, simply plug the USB receiver, plug and play directly. (Note: The USB receiver is stored in buttom of the mouse)Widely Compatibility: Bluetooth mode works with Windows / Android / MAC OS system. Easy to pair and connect, and do not occupy any USB ports. 2.7GHz mode works with laptop, desk