Entry Door Alarm with Built-in Siren, Operated by 3 x 1.5V L

Window, door guard detects entry protecting your shop, office, home or any entrance inside a house requiring protectionEasily mounted on door frame by adhesive tapeIt gives a alarm sound instantly when opening doors or windowsMagnetic sensor detects entryBuilt-in high output sirenOperated by 3 x 1.5V LR44 button cell (included)Product size: 50 x 36 x 22mm