2.4G Wireless and Bluetooth 5.0: With Dual Mode Connection. It can work on TWO DEVICES, connecting one device through Bluetooth and the other through 2.4GHz USB Receiver. You could switch the mode between two devices by just one click. Note: You can't use Bluetooth mode and 2.7GHz at the same time. Silent Click and Adjustable DPI: Special soundless design for the right and left buttons, make you concentrate on working or playing games without disturbing others.Switch DPI levels among 1200, 1400 and 1600 to 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. Rechargeable and Erengy Saving: To save power and for long-term usage, the mouse will automatically enter into the sleep mode after 11 minutes of inactivity, it can be waken up by clicking any button. The mouse built-in rechargeable battery, with a charging cable. No need to change batteries. 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) 1521Perfect after-sales service: If you have any quality issues or do not like it after receiving it, please contact us and we provide free return and exchange services