O&C Pet Dog Cat Puppy LED Flashing Collar Safety Nylon Night Light Pendant Made from 100% tough Nylon strap and rain resistant electronics. Adjustable buckle and hand grip webbing make the collar durable and comfortable for your loved pets. Suitable for small, medium and large dogs. Shinning in the dark makes your lovely pet very unique 3 modes: Steady, Fast Flashing, and Slow Flashing (you can change the models through the ON/OFF Button)