Easyfit Bluetooth® Single / Double Rocker Wall Switch (EWSSB / EWSDB) are universal energy harvesting wireless switches in the European 55 x 55 form factor.
EWSSB and EWSDB are transmitting the button status based on the 2.4 GHz Bluetooth Low Energy (BLE) radio standard.
EWSSB and EWSDB are based on the maintenance free, self-powered Bluetooth Low Energy (BLE) pushbutton transmitter module PTM 215B.
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