NiteIze NiteHowl Rechargeable LED Dog Collar. Easily slides over your dog's neck as a bright addition to their existing collar. Micro USB rechargeable. Disc-O Select technology features three selectable colors of red, green, and blue, or color-changing Disc-O mode. 360 degrees of illumination. Weather-resistant. Cut to fit from 12"-27". 5.5 hour run time. 1.5 hour recharge time. Charging cable not included.