USAutomatic 12/24 VDC Universal Dual Channel Receiver | USA-030207 liftmaster K77-19130 It has a built-in radio

It has a built-in radio transmitter with a 250-foot range in line-of-sight conditions

Heater: Green/White Wires: 10–40V DC or 8–28V AC

Built in battery backup

OXI/A and SMXI/A Nice Apollo receivers

USAutomatic 12/24 VDC Universal Dual Channel Receiver | USA-030207 liftmaster K77-19130 It has a built-in radioUSAutomatic 12 24 VDC Universal Dual Channel Receiver USA 030207 The 12 24V basic receiver is a 2 relay output receiver, operating at 433,92 MHz in AM ASK modulation. It is designed for automatic closing systems and anti burglar systems. The operating frequency is among the European harmonized frequencies. The antenna is connected with an F type connector. The relay outputs are 2: P1 and P2. P1 with relay contacts C and N O P2 with relay contacts C