Wireless Keypad/mouse Combo Mini Ultra Slim Profile + 7 Convenient Hotkeys. Patent 2xButton-No more Double Click - Just one click on 2X Button straightly access files and programs easily. Save time and improve efficiency.(No Driver Needed!) The 2.4G RF wireless technology is fine-tuned with 16 selected channels;it offers precise and smooth wireless operation even in busy wireless environments.It allows many wireless devices to operate simulataneously in one area without interfering in the range about 10m. Specially designed with ID code button,the mouse and keyboard allows you to use any A4Tech reciever. In case of losing it, you may simply obtain another one without the worry of tossing the working mouse and keyboard. 2.4GHz RF wireless mouse is designed with 4 Level Auto Power Saving modes with ultra low battery power consumption, it only requires 8mA of electric current to operate. It saves valuable battery power and cost.