The Osram EASYFIT Bluetooth 2Switch Batteryless LE. It is based on the Bluetooth low energy pushbutton transmitter PTM 215B.Switch frame could be replaced by the frames of certain other manufacturers
The Osram EASYFIT Bluetooth 1Switch Batteryless LE. It is based on the Bluetooth low energy pushbutton transmitter PTM 215B.Switch frame could be replaced by the frames of certain other manufacturers