1. Built-in receiver for easy collection; 2, plug and play, mobile more stable, more accurate; 3, using matte material, excellent grip, lightweight, durable design; 4, enjoy the comfort and ease available everywhere, fit the shape of the palm, use the natural comfort grip, reduce hand fatigue; 5, save power for you: stop to enter the standby state, standby current 0.4mA, stop for 15 seconds to enter the sleep state, sleep current 0.08mA (activation mode: mobile activation); 6, optical engine: experience smooth, accurate tracking; 7: Built-in rechargeable lithium battery Large battery capacity: 450HMA