About this item [Perfect Rechargeable USB LED Dog Collar]Like normal mobile devices, the flashing dog collar can be charged via a USB cable. This way, you don't have to worry about frequent battery replacement There are no additional costs. [Pure environmentally friendly nylon material]The LED light-up dog collar is made of nylon with filled neoprene material. This material is durable, flexible, easy to dry and extremely soft. LED light-up dog collar with ABS -Buckle. The soft collar and plastic buckle provide comfort for your pet. [Multiple LED modes can be selected]LED dog collar lighting modes can be selected or changed according to your preference. There are 3 different ones Lighting modes: fast flashing, slow flashing or steady on. It can work for more than 8 hours of lighting time per full charge. [Optional and adjustable collar length length]Each pet collar has different sizes. You can measure your pet's neck first, and then choose the most suitable size for your dog. In addition, the length of the collar can also be adjusted in pets. It is easy to put on and loosen.