Created for our Winter Light Branches, the Battery Power Pack 4.5V uses 3 x AA batteries (sold separately). You can attach up to 3 Winter Branches of any size to one battery pack. Choose steady on or blink functions. If you use multiple battery packs, in the blink mode each set of branches will blink at a different time allowing for very creative effects. Combine steady on and blinking for even more effect. The 3 wires separate at the pack and are about 18 inches long. This gives you plenty of wire to separate your branches in the arrangement. Note that you cannot insert the battery pack or branches in water. This pack is 3 by 1.75 by .75 and has a clip on the back.