ZB5RTA331 Datasheet PDF - Schneider Electric

The Harmony wireless and batteryless pushbutton range enables remote control of a relay (receiver) by means of a pushbutton (transmitter). This new technology allows an operator to be mobile or to have a control mounted on-board a vehicle (trolley, truck, etc.). The pushbutton is always available and requires no maintenance (no battery needed). Reduce installation times and costs by totally eliminating wiring and associated equipment between the pushbutton and the electrical enclosure.