SK-910R4Q - Wireless Key Switch RF Receiver, 4 Channel, 500ft, 315MHz, 4 Output Modes, CODEBUMP™PN SEC SK 910R4 * 4 BUTTON KEYFOB RECEIVER Control your home automation functions i. e. (garage door, alarm panel, house lights, etc.) from up to 500ft away! Outputs: Output one (1,000 users), Output two (10 users); total of 1,010 users Two form C relay outputs Output two can be programmed for use with a doorbell Backlit keys for easy nighttime use Two multi colored status LEDs EEPROM protects against power loss Rugged aluminum construction (IP65