For use with safety edges on gates and commercial doors Features For use with safety edges on gates and large commercial doors Can be used where hard wires are impractical Easy to install and mount More economical than coil/cord sets Power: 9 V battery Frequency: 300 MHz (310 MHz also available) Codes: 1,024 (set by dip switches) Dimensions: 4 x 4.28 x 2.22 inches