Size:  1.73`` x 0.97`` x 0.62`` | 44.02mm x 24.82mm x 15.87mm. This clippable LED collar light is perfect for keeping smaller pets visible in the dark. The weather-resistant light clips easily to a collar`s D-ring and turns on with a simple twist. ``The Nite Ize PetLit LED Collar Light is a unique battery-powered LED that you can clip securely to your pet`s collar, keeping him or her stylish and visible at all hours of the day and night. Made of durable plastic with a playful design or jewel crystal decoration, the bright LED light is easy to activate with a simple twist. It`s a fun, yet reliable way to keep your furry friend safe and visible when you`re out hiking, camping, running, walking, or playing in the park - and all other early morning or late evening romps. Bright white LED illumination Available in a variety of designs Compact, convenient illumination Battery run time: 24 Hours Easily replaceable 1 x 927 3V lithium battery included Weather resistant Secure clip - easy to attach and remove from the D-Ring of a pet`s collar. Twist on/off.