When you have chosen the lights you require from our low voltage lights range, then it is essential that a power pack is purchased to power them. The premier choice for large domestic & commercial connectable light displays, this Power Pack, available in black or white, is designed with quality & performance so powering up to a maximum of 4, 000 LEDs is a breeze. It comes with 4 ports that can run separate light strings at the same time (see image). The pack is only supplied with a single multi-function controller for one port. If you wish to use any of the 3 remaining ports then an additional controller (s) must be purchased. Included in the power pack is a standard household plug, transformer, 10 metre lead cable (from the plug to the first light) & an 8 function controller unit. Note: Only 1, 000 LEDs can be run from a single port at any one time. So if your display contains more than 1, 000 then simply use the other ports to continue your display.