The Halo 14U Bi-Color 14" LED Ring Light from NanLite features a distinctive-shaped light fixture with a variable color temperature from 2700 to 6500K to match other fixtures, ambient light conditions, or just for creative expression. The ring light has a central opening of 11" so you can shoot through it with the provided smartphone bracket for a smooth, near-shadowless effect that is flattering to your complexion. Ideal for selfies, there's a mirror for posing. Another bonus is the attention-grabbing circular catchlights reflected in your subject's eyes.The Halo 14U runs on AC power via its included adapter, but it also has a built-in Li-Ion battery that will give you 1.5 hours of runtime at 100% power in locations where AC power is unavailable. A carry case is included.