Wireless Door Window Entry Safety Security Alarm

1) Easy to install--just peel and stick 2) Alarm is activated when the two pieces are separated 3) Applicable scope :Ideal entry warning for homes apartments mobile homes dorms offices hotel rooms garages and more! 4) Electronic Magnetic Sensor detects entry 5) Easily mounted to windows or doors with included mounting tape 6) Convenient on/off switch 7) Wireless unit has no cords 8) Can be installed directly on doors and windows. 9) High sensitivity and can be used to protect people against stealing. 10) Give an alarm if someone opens the door or the window * Specification: 1) Size: 92x32x18mm 2) Net Weight: 30g 3) Power supply: 2x1.5v(AAA battery) (Not included)