Glowys&reg; LED Dog Collar Rechargeable USB One Size Fits All Waterproof Night Safety Pet Dog Collar (Blue) 3 Light Settings - Slow flash, quick flash & steady glow (Easy push button) One size fits all:Collar measures 70cm - Can be cut to any length using scissors to fit your pet! Perfect fit! Rechargeable via Micro USB - Can be charged via Phone Chargers, Laptops, PC Weatherproof - good for all conditions, Adjustable & Comfy for your dog. The LED flashing tube can be set to flashing or light continuously by means of touch switch (approx.100 hours,approx.50 hours continuous light),and size in individually adaptable by simple cutting.