Description:   Household Wireless Security Alarm System Door Window Motion Detector Guarding Burglar Sensor Smart Home.  The security alarm system is triggered after detecting the door, windows open suddenly, password release alarm.    Features:  -Fantastic guard for your house.  -Suitable for home and office indoor use, not for balcony where has insolation or rain, not waterproof.  -Loud alarm of 105dB to scare the intruder.   -Lower power remind with LED indicator.  -Magnetic sensor, door and window motion detector.  -Keep the distance between magnetic sensor and device should be shorter than 10mm and and arrow aims to each other.  -Make sure one install in door / window, another one install in door / window frame, that to let them separate when the door / window is opening.  -Password release alarm.    Specification :  Color: White;  Power Supply: 2 x AAA batteries (not includes for safe shipping);  Working Temperature: -10℃-60℃;  Working Humidity: Below 80%;  Device Size(approx. ): 4. 2 x 2 x 8. 2cm(L x W x H);    How to use :  1. Make sure the device is not in guarding. (LED flash every 3secs).  2. Press No. 1 button more than 2secs and the device rings Bi, LED flashed, it gets into setting password.  3. Press old password(First time to set password is 1234), after it rings Bi Bi, press new password, when it rings Bi Bi, it's finished.  4. Set the alarming time span, press No. 2 button more than 2secs and gets into setting, press No. 1 button and it rings Bi Bi Bi, the time span is changed to 0sec, Press No. 2 button and it changed to 3secs, Press No. 3 button and it changed to 5secs, Press No. 4 button and it changed to 10secs.  5. Organize/retreat a defense, press the on/off button when it's standby state and it rings Bi Bi Bi, it will be alert after 15secs and LED flash every 3secs,press password and on/off button to retreat.  6. Press password in 3sec and press on/off button after open the door to retreat the defense, otherwise, it will alarm for 15secs every 30secs until the door  is closed.     Package Includes:  1 x Wireless Door Windows Security Alarm Device;  1 x Magnetic Sensor