Black & Decker FW3000 5-Piece Freewire Indoor/Outdoor Starter Kit Messenger Hub is the ""Brain"" of your freewire system - it relays wireless messages to your freewire system" Indoor Remote controls lights, small electronics, and more from the palm of your hand Lamp Receiver provides convenient control of incandescent lamps rated up to 300 watts Outdoor Lamp Receivers are ideal for controlling low voltage landscape and holiday lighting 5 piece kit includes (1) Messenger Hub, (1) Indoor Remote, (1) Lamp Receiver, (2) Outdoor Lamp Receivers, and (1) 3V Lithium battery