SPECS: Universal sizing: cut to fit from 12" - 27" | 30.5 cm - 68.5 cm > DESIGN & DETAILS: Easily slides over your dog's neck as a bright LED addition to an existing collar Choose from Disc-O mode or three selectable colors (red, green, blue) Disc-O mode features unique color-blending pattern 360° of illumination Weather resistant Micro USB rechargeable (cable not included) Model: NHOR-07S-R3 TECH SPECS: Battery run time: 5.5 hours Recharges in approximately 1.5 hours