Features: Support one wall panel transmitter controls multiples RF433 receivers and vice versa. Just stick the switch anywhere you want with the double-sided tapes, no extra wires needed. Control your lamps or other appliances just stay in bed, couch, or chair with comfort instead of getting up. Provides more flexibility to control appliances in daily life. Apply to kinds of appliances and suitable for home, office, hotel, etc. Note: The RF433 relay receiver and the wall panel remote transmitter switch must be used together.