Lasershield Pro Instant Security MCT-234 4-Button Keyfob Portable 4-button keyfob transmitter designed for arming and disarming of wireless security system Works like the keyless entry of a vehicleuser pushes the lock button to arm and the unlock button to disarm Allows disarming of security system before user opens door from up to 300 ft away Transmitter signal is encrypted and changes every transmission, making code grabbing virtually impossible Can also be used for emergency signaling, access control, home automation and remote control applications