Multi LED string lights on green wire. Battery operated. 50 lights per string. Many functions are built into the battery pack and can be controlled with the push buttons on the rear. Functions include: steady on, blinking, flashing (fast), or flashing (slow). All of these functions are then controlled by either manual on/off, timer (4/6/8 hour timer that repeats every 24 hours), or a dusk to dawn photocell. 5 inch spacing between bulbs. Approximate lighted length is 20'. Lead from the battery pack to the first light is 12 inches. Requires 2 C batteries (not included). For indoor and protected outdoor use.