1.2 Flashing Modes: push the button once is quick flashing, push twice is the light will stay lit. And the dog tag is high visible up to 1/2 a mile away. 2.Multifunctional Purpose: The LED lights dog collar light is not only suitable for pets, but also can be used when people are running at night, riding a bicycle or camping outdoors. 3.Durable & Tough: The light up dog collar accessory is sturdy and has a durable stainless steel carabine, so it can withstand even puppy loves to roll and run. 4.Replaceable CR2032 Batteries: The dog collar light can keep going for 30 hours and can be easily replaced. 5.The light can emit a soft and long-lasting light for night walking, running, or any other night activities.