Magnetic Sensor

We are offering mini wireless door & window magnetic sensor with burglar alarm bell.
high quality & reliable + easy to install + no expert required + wireless sensor door window entry burglar alarm bell
product features:
compact design, no wiring required.
high sensitivity can be used to protect people against stealing.
easily mounted by adhesive tape to window or door.
electronic magnetic sensor detects entry alarm is activated when the two pieces are separated.
convenient handy onoff switch.
powered by 3 x 1.5vlr44ag13 button cell.
portable enough to take with on business trips and vacations.
operation instruction:
peel off the adhesive tape, attach the main sensor on the door window and attach the magnetic stick adjacent the main sensor on the frame.(the arrowhead side to the sensor).
test the setup by switching on the system and see whether the alarm can be triggered by opening the door window