The Outdoor Door Contact is used to detect the opening and closure of outdoor gates, entries, exits and more. The Door Contact can also be placed on metal materials, while its powerful magnet can tolerate a wide gap to reduce false alarm. The device also has the capabilities of communicating signal problems along with low battery situations. The front and back tamper switches provide tamper protection against unauthorized device opening and removal. Features: Mounted on outdoor gates, entries, or exits Compatible with metal material Battery replacement without device removal from installed IP66 waterproof design Specifications: Dimensions: H:9.6 x W:10.6 x D:6.4 cm Colour: Grey Guarantee:2 years Batteries Required: Yes Model Number: AC-ODC Self Assembly Required: Yes