Door & Window Sensors
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TP-Link Tapo Smart Contact Sensor
Tapo Smart Contact Sensor, 868 / 922 MHz, 61.4 x 37.5 x 12.3 mm -
Cisco Meraki MT20 door/window sensor Wireless White
Bluetooth, AA, 2.400–2.4835 GHz, 81.2mm x 39.7mm x 19.5mm, White