Quick overview from the supplier:
Ajax DoorProtect Black
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https://ajax.systems/products/doorprotect/
Installation method: Indoors
Compatibility: Operates with all Ajax hubs, range extenders, ocBridge Plus, uartBridge
Sensing element:Reed switch
Alarm signal delivery time: 0.15 s
Activation threshold: Small magnet — 1 cm; Big magnet — 2 cm
Power supply: Battery: CR123A battery, 3 V
Battery life: Up to 7 years
Temperature sensor: Available
Operating temperature range: From -10°С to +40°С
Permissible humidity: Up to 75%
Sensor resource: 2,000,000 openings
