Masione Lock Screen Hidden key 2.4GHz Wireless Optical Mouse/Mice + USB 2.0 Receiver for PC Laptop Computer The first mouse to protect the safety of privacy. Hidden Key & Lock Screen Key make fun of the work. With the latest 2.4 GHZ wireless techonology, can be normally used with 10m range. Advanced design without switch. Not moving for 5 minutes, this mouse goes into sleeping mode automatically. Wake up the mouse by clicking any key. Can be working whenever and wherever: mouse can be used on sofa, dining table, even pants without mouse pad normally. Mouse made of newest location technique, precise localization.