Specifications: LED light glows and flashes in darkness. Bright light can be seen from far away. Helps to keep you and your dog and other pets safe during walking. Provide safety for your dogs and pets while it's out alone at night. Also work as a decoration: let your dog more attractive. Easy and comfortable to wear and remove. Easy to use: simply pushing the control button makes the light on/flash/off. Type: LED Pet Collar Material: Nylon Power Source: LED Light Modes: Quick Flash, Slow Flash, Still On Battery: 2 x CR2016 Button Batteries(Included) Occasions: Outdoor, Night, Party, etc Features: LED Light, Comfortable, Safe Size Details [Our Size S] Pet Neck Size: 35cm - 43cm/13.78" - 16.93", Width: 2.5cm/0.98" (Approx.) [Our Size M] Pet Neck Size: 40cm - 48cm/15.75" - 18.90", Width: 2.5cm/0.98" (Approx.) [Our Size L] Pet Neck Size: 45cm - 52cm/17.72" - 20.47", Width: 2.5cm/0.98" (Approx.) [Our Size XL] Pet Neck Size: 52cm - 60cm/20.47" - 23.62", Width: 2.5cm/0.98" (Approx.) Notes: Note: the color selection only for LED light, not for collar itself. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x LED Pet Collar LED light glows and flashes in darkness. Bright light can be seen from far away. Helps to keep you and your dog and other pets safe during walking. Provide safety for your dogs and pets while it's out alone at night. Also work as a decoration: let your dog more attractive.