Sound and light alarm The door magnet emits a 140 decibel alarm sound + LED light flashes for Ultra-long standby and long battery life Energy-saving and power-saving standby for up to one year Alarm principle When someone opens the door or window illegally (the host and the magnetic strip are separated), the alarm immediately emits a alarm sound 6 major functions: volume adjustment, light reminder, anti-theft mode, beep mode, welcome mode, SOS mode Wide application scenarios: home, hotel, rental house, children climbing , drawer anti-theft Volume: 140 decibels Remote control distance: equal 25m (open space) Door sensor standby time: about one year Remote control standby time: about one year Colour:White Material:ABS Package Contents: 1x Door Magnet 1x Magnetic Stripe 1x Remote Control 2x AAA Batteries 1x Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.