"Keep your dog safe and easily visible after dark with the Nite Ize NiteHowl Rechargeable LED Safety Dog Collar. This cut-to-fit unit lights up around the entire collar to offer a full 360 of easy-to-see LED illumination. Rechargeable LED unit offers the choice of 3 colors (red, green, or blue) as well as a Disc-O mode that fills the collar with a wild, flowing blend of all 3. Flexible polymer collar. Water-resistant LED housing with push button control. Fits necks from 12""-27"". Micro USB rechargeable (cable not included). Run time: approximately 5.5 hours.Manufacturer model #: NHOR-07S-R3. Bright, rechargeable LED dog collar Cut-to-fit design for custom fit 360 of easy-to-see LED illumination - keeps your dog visible after dark Choose from 3 colors - red, green, or blue) Disc-O mode - flowing blend of all 3 colors Water-resistant LED housing with push button control"