
Dimensions: 6.3 x 3.3 x 2 cm - Sound intensity of 90 dB (A). Easy installation: Easy to mount - With adhesive tape for window or door. Operation: 3 x 1.5 V LR44 button batteries (included). Working principle: A switch with a magnetic sensor detects the entry, in order to protect your home or office, whether you are inside or outside. Wide application: Ideal for home, office, hotels, apartments, garages.