Package Includes:1*magnetic sensor(battery is not included)1*Magnetic stick3* remote controlFeatures1. Anti-theft alarm function; Entrance remind function 2. One remote controller could control several magnetic sensors 3. Excellent home use product tiny and fashion 4. Volume: 110DB 5. Alarm and door bell function for your option 6. Low energy and long work time 7. Simple install 8. Application places: home， workshop office， store， etcUsing method1. When firstly use the smart home security magnetic alarm， open the cover the battery chamber， press the remote control leaning code button. 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. 2. 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. 3. Increase remote controls: disassemble the battery of the magnetic alarm， and continually press the learning code button. Assemble the battery， and the magnetic alarm will sound BI one time to indicate that the alarm is open. And the magnetic alarm will sound Bi...BI...two times in 5 seconds the remote control is added successfully. (notes: one magnetic alarm can be matched with 8 remote control at most) 4. Add magnetic alarm: continually press the remote controls learning code button， and assemble the new magnetic alarm battery. When the magnetic alarm sounds BI one time， the alarm is open. Then the magnetic alarm sound BI...BI two times in 5 seconds， It indicates that the magnetic alarm is added successfully. (One remote control can control 100pcs magnetic alarms.)NotesPlease 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. 1. Only use in indoor， banned in outdoor use. 2. Working environment temperature: -10 to 60 degree Celsius 3. Working environment humidity: < 80 percent 4. Storage temperature: -20 to + 70 degree Celsius