Quantity: One set of 3 screw-in lamp sockets and one remote control. Each lamp socket accepts standard screw-in light bulbs up to 60 watts. Each socket can operate on any of 5 channels, allowing up to 5 sockets to be operated independently with the included remote control. OR place multiple sockets on the same channel to control all lamps or lights in a room or even a whole house. Simply remove a small screw in the socket then select the desired operating channel via DIP switches. Lamp sockets are NOT INTENDED FOR OUTDOOR USE. The 5 channel remote control has a range of up to 60 feet with no obstructions. 25-30 feet in a multi-room environment. Remote operates at 315 MHz. The remote is powered by one 12V A23 battery (INCLUDED). This battery is found at most major retailers and is often used in cameras and garage door remote controls. The best feature of this system is it's expandability. A nearly unlimited number of sockets or outlets may be added. For example, by buying this set along with 2 additional remote controls and 6 remote controlled electrical sockets a user could place one lamp socket and 2 wall outlets in the bedroom and set them all to be controlled by Channel 1. Then place 2 lamp sockets in the hallway to be controlled by Channel 2. Then place the remaining 4 wall outlets in the living room to be controlled by Channel 3. The user than controls light and electricity in 3 areas of the home or office. This arrangement leaves 2 unused channels for future expansion. Also, multiple remote controls can be used to control the same wall outlet or light socket. For example, buy three remote controls to operate your basement ceiling light sockets. Simply set all of the remote controlled light sockets to operate on Channel 1. Then keep one remote in the kitchen, one in the bathroom, and one in the bedroom. Pressing "1 Off" on any of the remotes will turn off the all of the lights set to Channel 1.