Specifications: Shinning in the dark makes your lovely pet very unique. This is an excellent way to ensure both you and your pets safety in dark. Adjustable buckle and hand grip webbing make the collar durable and comfortable for your loved pets. Type: Pet Collar Gender: Unisex Fit for: Dog, Cat, Pet Material: Nylon, LED Light Bar Power Supply: 2 x CR2016 Batteries (Included) Flash Modes: Fast, Slow, Constant Features: Adjustable, Water Resistant, Glowing Width: 2.5cm/0.98" (Approx.) Size S: 22cm - 40cm/8.66" - 15.75" (Approx.) Size M: 32cm - 50cm/12.60" - 19.69" (Approx.) Size L: 48cm - 60cm/18.90" - 23.62" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Pet Collar(Batteries Included)