KEEP YOUR PET SAFE: Attach it on collar will make vehicles will see your dog well in advance in dark, efficiently prevent your dog from unexpected danger during night walking.<br /> <br /> LONG-LIFE BETTERY&amp;USB RECHARGEABLE: This light is equipped with 70 mA capacity battery, has a run time of up to 6 hours and fully recharges in 0.5 hour using a micro USB cable.<br /> <br /> WEATHER RESISTANT&amp;WATERPROOF: It has a durable stainless steel carabiner and strong case, that make it waterproof and dust resistant, perform well under all bad weather condition.<br /> <br /> THREE MODES&amp;SUPER BRIGHT: Fast flashing, slow flashing, glow steady.Visible approx up to 500 meters(547 Yards) in darkness. Very easy to clip on dog leash, collar, harness, keychain, backpack etc.<br /> <br /> EASY TO USE: Dog collar lights for the dark can easily connect the lights to dog collars, keychains, bags and other places by using the miniature carabiner. It is small and portable, and the button switch is simple.