From the Manufacturer
Keychain Remote arms and disarms the LaserShield Burglar Alarm System. When both the arm and disarm buttons are pushed simultaneously, a panic signal is sent to the master alarm unit, sounding a 105 decibel siren, and instantaneously calling the emergency response service. Works up to 150 ft. away.

works with LaserShield Instant Security System * sends Arm, Disarm, and Panic commands to Master Alarm Unit and Wireless Detection Unit up to 100 feet away * b (more…)