... with key chain 5. DC powered Feature:Wireless control, easy to installControl Lights, Motors, Fans, electrically operated Doors/Locks/Windows/Blinds ... off relay 1 (disconnect B and C, connect A and B)3) Press button 2: Turn on relay 2 (connect B and C, disconnect A and ... )4) Press button 2 again: Turn off relay 2 (disconnect B and C, connect A and B)Package Include:1 x Receiver: S2T ...