Silent switch technology provide a no clicking sound and for better working environment. Smart Link auto connection when plug in the receiver into USB port. Up to 1600dpi and high precision sensor offers accurate, precision control and clicking ability. On/Off Switch - Conserve battery power by turning off your mouse when not in use. Three levels of power-saving : 1) Low power consumption engine; 2) Sleep mode power-saving function; 3) Hardware On/Off switch 2.4GHz transmission and up to 10 meter of wireless range give user more freedom and no interference of movement. Comfortable in Either Hand - Ambidextrous design makes it comfortable either way. Compact Mini Nano Receiver lay inside of the mouse body and convenient for the travelers.