Open is to use the charge, like the mobile phone, charging can also play, but the power is consumed, but the wireless mouse put that does not move the charging switch is not much difference. Wireless mouse refers to the mouse that is directly connected to the host computer without cable, and uses wireless technology to communicate with the computer, thus avoiding the bondage of wires. Wireless communication is usually adopted, including Bluetooth, Wi-Fi (IEEE 802.11), Infrared (IrDA), ZigBee (IEEE 802.15.4) and other wireless technology standards; 27MHz RF refers to a technology that uses a 27MHz ISM(Industrial, Scientific, Medical) radio frequency band to output power.