Rolling Code Transmitter 433.92MHz Frequency Self-Learning Remote Technology. Compatible with all EAGLE Brand Operators. 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. Dimensions : H-2 1/2" X L- 1 1/2 X W- 1/2