Set of 4 Wireless Door and Window Alarms - Anti-Intrusion, Magnetic, 100 dB - Home Protection Against Burglary

MAGNETIC: The alarms work thanks to the magnetism between the alarm transmitter and the magnetic receiver. The 100 dB siren is triggered when a door or window equipped with the device is opened (trigger gap: more than 10 mm).
EASY: The alarm sensor and the magnetic receiver are equipped with adhesive tape. No tools are needed; simply stick them to a door frame.
TECHNICAL DETAILS: Transmitter dimensions: 9 x 3 x 2 cm; magnetic receiver: 5 x 1 x 1.5 cm | Batteries: 2 x AAA 1.5V per alarm (included) | Volume: 100dB
MULTIPLE USES: Increase the security of your front door, patio or balcony, your bedroom, or your children's room – the set of 4 alarms and receivers gives you the choice.
NOTE: Please ensure that your apartment or house has the right conditions for installing the security system, without accidental triggering.