M-1 piece Luminous Dog Collar 7 Modes LED Dog Collar, USB Rechargeable Waterproof Leash Adjustable Nylon Collar for Small/Medium/Large Dogs High Quality Material, High Visibility:The LED dog collar is made of nylon and PU leather. The unique paw print design keeps your pet visible up to 500m away in low or no light, keeping your dog safe and seen in snow, dusk, night, in the forest, and on the driveway. The sturdy D-ring can be attached to any dog leash. [USB Rechargeable LED Collar] This light-up dog collar is USB rechargeable, more economical and environmentally friendly . Large battery capacity, charging about 2 hours, can be used continuously for 6-10 hours under constant light mode. Comfortable LED design, does not get hot even with prolonged use. [You can adjust and change the light mode of the LED collar by pressing the button: six constant brightness modes with colors adjustable (red, blue, green, pink, light blue, yellow), the last mode is auto-cycle mode. [Our flashing collar can withstand light rain when walking your dog, but do not let the necklace soak in the rain or wash it for a long time, gently wipe it to make sure it works properly. [Size M (15.7-19.7in)] The collar can be easily adjusted thanks to the elastic buckle (Note: M: 40cm - 50cm / 15.7" - 19.7", please choose the size according to your pet's neck length).