Stored transmitters Rolling Code 300 Remotes Max Frequency 433.92MHz Relay Contact Load 1A ,30VDC Working Voltage 12-24VAC/DC Self-Learning Remote technology The CHROME series universal receivers and accompanying remotes, utilize rolling code technology, providing optimum security and convenience for single-family homes, multi unit communities and commercial buildings. This cutting edge technology comes with built-in, self learning programming at the simple push of a button.