GLOWING&SAFETY DOG COLLAR: The collar made of durable plastic, your dog will be seen easily in night walk or vehicles. ADJUSTABLE DOG COLLAR: Our led dog collar light length 27.5 inch, it could be cutted by scissors to fit your pet. THREE LED DOG LIGHT MODES: The led dog collar has three mode for option, fast flashing, slow flashing, glowing. Easy to use clips the led dog collar is no hassle to put on. USB RECHARGEABLE COLLAR: The dog collar work without batteries, it can be recharged by USB cable with daily device, like computer USB port, smart phone charges. WATER RESISTANT: The collar is not waterproof, only water resistant. It means that could work in wet grass or lightly rain, but could not use in dogs swimming.