Specifications:Package Include:3 x Magnetic Sensor (Batteries not included)1 x Magnetic Stick1 x Remote Control1 x User ManualFeature:- One Magnetic Sensor can match with at most 8 remote controllers freely.- One remote controller could control several magnetic sensors.- Excellent Home use product Tiny and fashion.- Volume: 110DB.- Alarm and door bell function for your option.- Low energy and long work time.- Simple install.- Anti-theft alarm function.- Application places: home， workshop， office， store， etc.- Entrance remind function.Using Method:- When firstly use the smart home security magnetic alarm， open the cover the battery chamber， press the remote control? leaning code button， Hold， Meanwhile， assemble 2pcs AAA batteries on the battery chamber. There will be one Bi...sound when the alarm is open. Then there will be two Bi...Bi...sounds when code pairing is successful. Then the remote control can control the magnetic alarm.- Install instruction: select the installation place， pear off the cover of the double faced adhesive tape， and stick the magnetic alarm. Magnetic stripe arrow must be aligned with magnetic alarm.Magnetic Sensor Parameter:- Voltage: 3V， 2 x AAA- Stand-by Volume: 100A- Alarm Volume: 30mA- Frequency: 433MHZ- Alarm Response Time: 200ms- Stand-by Time: 8-12 monthsRemote Control Parameter:- Voltage: 12V， 1 x 27A- Stand-by Volume: 1A- Working volume: 15MA- Stand-by time: 8-24onths- Remote control distance: 20mWorking Environment Temperature: -10 ~ 60 degree celsiusWorking Environment Humidity: < 80%Storage Temperature: -20 ~ +70 degree celsiusLow Pressure Detection:- When the battery is low， the LED of magnetic door will flashing once per second， prompt low， please replace the battery.- Remote control lights flashing dimmed or remote distance becomes shorter， please replace the battery.NOTES:- Please make sure the arrow of the magnetic align the Magnetic Stick， magnetic stick stripe on the right side of the magnetic sensor， when the door is closed， the distance between magnetic sensor and magnetic stick should less than 10 mm.- Only use in indoor， banned in outdoor use.Magnetic Sensor Size(L x W x H): 85 x 43 x 17mmMagnetic Stick Size(L x W x H): 85 x 10 x 14mmRemote Control(L x W x H): 60mm x 30 x 11mmNet Weight: 131gPackage Weight: 156.7g