Smart Switch -- Intelligently switches between Bluetooth 3.0, 5.0, and 2.4G to ensure stable wireless transmission and a wider range of adaptable devices. No need to worry about USB port shortage or the loss of receiver with reliable 10 meters operation. •Ergonomic Design – Small and slim, suitable for small and medium-sized hands and travel users; Metal finish for smooth texture when in use. •1300 DPI Tracking -- 1300DPI tracking engine, applicable to multiple surfaces. 1300DPl high-precision tracking engine, accurate positioning. Can be used on leather, cloth, paper, wood, resin, and other surfaces. •Rechargeable Battery -- with a rechargeable battery with USB Type-C input wired charging. •Silent Click -- Silent and micro movement. The use of silent micro-motion can effectively reduce the use of noise up to 90%, suitable for bedrooms and libraries.