Wireless Window & Door Alarms D-157MT Long Range Door Magnetic Wireless Door Window Sensor Alarm Main Features: * Remote range up to 150M. * 36 optional music melodies. * 4 level adjustable volume control, OFF-Low-Middle-Hi. * Sensor CR2032 3V battery*1 * Wireless door magnetic * IP44 waterproof * Colorful LED flash light * Wide voltage 110V ~ 240V. * Self-learning code
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