Techko Maid Pool Area Entry Alarm with 2 Magnetic Sensors and Bypasses: * "Always On" alarm protection * Adult pass-through auto reset button * High-output 110-120 dB 6-tone alarm * Water/weather resistant housing * Additional magnetic sensor for screen door exit/entry * 9V battery operation (not included) * Low-battery LED indicator * Additional pass-through button for delayed entry from either side of door or fence * Intended for interior or exterior use * Versatile and efficient