COMPACT STRUCTURE - Attached stainless steel spring clip carabineer, push button switch provide glow and flash modes, replaceable 3V lithium battery. DURABLE - Water resistant. Provides an ambient glow bright enough, battery gives 20 hours in glow mode or 25 hours in flash mode. GREAT FOR DOGS - All-weather lightweight dog lights, perfect collar charm when your pup is playing out in the dark night. MULTI USES - Easy to use as a dog apparel light, or keychain light, locate tent lines and camping gear, attach to your person for visibility. GUARANTEED - Designed in the USA, we stand behind the quality of our products. We guarantee your 100% satisfaction or money back.