The Sherlo Wireless Keypad is designed for Secure access control of buildings, properties, gate/garage entrances, internal doors, striker locks and even arming/disarming alarm panels. The unit can be programmed with up to 9 RF Channels to control different receivers. You can very easily program the keypad on a PC in Notepad so that you don't have to waste time manually programming the keypad. This can then be very easily & reliably saved onto the Keypad using a microSD card. The keypad is battery powered, but has a 12V DC wired input connector.