The PetLit 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, the bright LED 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. Secure carabiner clip. Twist on/off. Weather resistant. Battery run time: 24 hours. Includes 1x replaceable 927 lithium battery. Product Material Polycarbonate