Features: ●Wireless magnetic contact with panic button used indoor or places without rain ●Built-in battery with long standby time; small volume, powerful function, easy installation, built-in antenna ●With magnet contact alarm, anti-tamper alarm; low voltage alarm and emergency alarm four functions ●DC12V, Static current: 10 uA, Operating current: 20 mA, 433Mhz/315Mhz |