The DSC PG9920 is a wireless PowerG repeater that relays digital data between wireless PowerG control devices and a PowerG control panel. The PG9920 repeater extends the wireless reach of the system by relaying transmissions to devices that would normally be outside the range of the control panel. The PG9920 will transmit the following service messages to the system, AC fail, tamper, low battery, supervision and end of life.