Easily Detachable Design - Compared with other light up dog collars on the market, the light up dog collar is designed with a detachable clip, easy to detach when you want to shorten the length of the collar ADJUSTABLE SIZE - Our LED dog collar can be cut to any length with scissors to fit different types of dog/cat breeds. The total length is 70 cm. Suitable for dog neck sizes from 20cm to 70cm High visibility - The LED dog collar is very bright, the visibility distance is about 500 meters to prevent your pet from accident and keep your dog safe in the dark, make your pet visible and attractive at night 2 lighting modes - Easy to adjust by pressing the button and switch lighting modes freely: fast flash, slow flash, steady on. (Note: the multicolor collar does not have a fixed light mode) USB Rechargeable - The dog collar can be charged with the included universal micro USB cable. It can illuminate 5 hours in flash mode / 2 hours in continuous mode after 30-40 minutes fully charged