Door Magnetic Wireless Bell Door And Window Alarms Strong Adhesive Wolfproof Anti-theft Alarms(Black)

1. Voltage: DC3.6V 2. Standby time: 3-6 months 3. Alarm volume: 110dB-120dB 4. Power supply: 3 x AG13 button batteries 5. Door magnet alarm, easy to install, long standby time, loud alarm, stable and reliable, compact and hidden 6. Designed for door and window anti-theft design, installation using double-sided tape, firm and very convenient 7. Weight: alarm about 35 g, magnetism about 8 g 8. Size: the alarm is about 4 x 5 x 1.5 cm, the magnet is about 1.5 x 5 x 1.5 cm Door magnetic alarm working principle: -When the door/window is open and the distance between the alarm and the magnetic strip is more than 15mm, the alarm will sound; the alarm will last for 30 minutes, after that, the alarm will be interrupted Installation instructions: 1. Please clean the surface where you install the alarm and magnetic stripe first, make sure the surface is completely clean and dry before proceeding 2. Please use the supplied double-sided tape to install the alarm and magnetic strip, and make sure it will not fall off 3. When the door/window is closed, make sure the alarm and magnetic stripe are not more than 5mm apart or in contact