Ulike trade; New Wireless Optical 4 Button Silent Mouse M2000 (Saving no light pollution) It is suitable for use quiet place like church,reading room,library,conference room,bedroom,dormitory,hospital,etc 97% Click Noise Down,Saving no light pollution Ergonomic,Elegant, Comfortable Grip 2.4GHz nano receiver and storage space Subminiature 2.4GHz nano receiver