Light strand consists of 33' of fine wire with 100 evenly spaced, warm white LED bulbs. This pack includes a USB cord, a battery pack and an 8 function remote for a variation of twinkling, flashing, fading and steady glow lighting. Automatic timer function turns lights on for 6 hours, off for 18 and back on for 6. The battery pack is designed for 3-AA disposable or rechargeable batteries (not included). You may also choose to bypass the batteries and simply plug it in with the USB cord. The lights and battery pack are waterproof so they can be used outdoors.