MULTI-USE: Clip the lightweight, durable Safe Light to your pet's collar, or use as a Carabiner, Keychain, locate tent lines and camping gear. PET'S NIGHT INDICATOR: Dog collar light can run up to 40 hours. It can emit a soft and long-lasting light at night. When your dog accompanies you on a night run or walking, flashing collar lights can help you always find the dog’s position. WATER RESISTENT: These led collor lights are water resistent but please be attention that they can not be soaked into water. EASY TO OPERATE: Two simple modes-glow and flash. Press once for a steady glow, twice for fast flashing, third for slow flash, fourth you can turn off the light. ABOUT DOG COLLOR LIGHTS: Six colours-Blue, Yellow, Orange, Red, Greena and Pink. Dimension of led light- diameter of 3.2cm and height of 5.1cm, the thickness is 1.9cm. With CR2032 battery included.