Door and Window Alarm - 4x Wireless Intrusion Alarm Set - Home Security Against Burglary - Magnetic Operation - 90 dB

Magnetic: The siren works thanks to the magnetism between the alarm transmitter and the magnetic receiver. The 100dB siren is triggered when the equipped door or window is opened (triggering distance: greater than 10mm).Simple: The alarm sensor and magnetic receiver come with adhesive tape. No tools are required; simply stick them to the 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 siren (not included) | Volume: 90 dBMultiple uses: Increase the security of your front door, patio or balcony, bedroom or children's room – a set of 4 sirens and receivers to choose from.NOTE: Ensure your apartment or house is properly secured to install a security system that cannot be accidentally triggered.