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Wireless door sensor alarm

15USD$
Home door and window anti-theft device, hotel shop security alarm, ultra-thin design, the back of the product adopts a high-viscosity back sticker, which can be installed on any door or window. When the distance between the host and the magnetic strip exceeds 10MM, it will immediately alarmsize: Host size: 75*39*12.2mm Magnetic stripe size: 32**11.5*10mm