Nite Ize PetLit LED Dog Collar Light, a durable plastic LED light with a playful design, ensures your pet's safety and visibility. Easily clip it to your pet's collar and activate the bright LED with a simple twist. With a 3 V voltage rating, lithium battery, 927 mAh battery capacity, and 24-hour run time, this light provides long-lasting illumination. The twist on/off switch and white beam offer convenient control and visibility. Includes (1) replaceable lithium battery.