Seco-Larm SK-919TP1H-BQ Enforcer Handheld Slimline RF Transmitters, 1 Button, 1 Channel

Compatible with all 315MHz Seco-Larm Receivers Rubber buttons eliminate damage caused by electrostatic discharge and helps make transmitter weatherproof Gold-plated battery clips and contact points extend the life of the transmitter Magic LED appears when buttons are pressed, LED transmission indicator Operates up to 500 feet with over 68 billion possible codes