SecurityMan SM88X Wireless Remote Controller for Air-Alarm1 and Air-AlarmII - Silver
SM-88X is an add-on wireless remote controller for SecurityMan Air-Alarm system. Its wireless transmitting distance is up to 300ft (in open area). It includes one 27A 12V alkaline battery which could last up to 2 years. Control buttons include Arm, Disarm, Home Alarm(when in home), and Panic Button.