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Thermokon · Key card switch · Bluetooth Low Energy
Self powered wireless key card switch that reports room occupancy over Bluetooth Low Energy.
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Part number728126
The SR-KCS BLE is a key card switch for occupancy based control of lighting or air conditioning, in rooms. Inserting a card in the slot sends a Bluetooth Low Energy message straight away. It needs no battery or wiring: a maintenance free electrodynamic energy generator powers it. It can be stuck to glass or a wall with the adhesive foil supplied, or fixed with screws.
From the manufacturer's datasheet for 728126.