The Story of Us:I am a pet lover and have 2 Dogs (one Jacky one Tony) and 1 dog (Nikky). And I have an idea to do best product for them, also for your pet.Before the product launches, I will let my pets try this product to ensure product quality. So you don?t have to worry about the safety of the product, my pets use this product every day.We aiming at bringing the best products and services to all pets !Are you worried about your loved pet are safe at night and frustrated some pet necklace loop don?t fit their size?---Our adjustable sizes item light up dog collar can help you get rid of these troubles!What Can You Get From Our light up dog collar?1). Specification for light up dog collar---Three flashing modes: quick flashing-slow flashing-stable glow-off, changing the flash modes just by click the button on the batter case.---Three Available Color Options: red, green, pink, blue.---Size: Samll:26.6~35.5cm, Medium: 35.5~52cm, Large:43.2~65cm.2) Package Including for light up dog collar---1x Light up dog collar---1x USB charge cableTips of How to use this light up dog collar? 1. You?d better get it be fully charged after first use up of the battery, which will promote the service life of the battery for collar.2. Measuring the length of your dogs, and adjust the buckle of the collar and let it fit your pets, and fixed it.3. Choose the flash mode that you need, and turn it off when not needed. Warning:1.Choking hazard small parts, not for children under 3 years old.2.Fast charge adapter may cause serious damage. Charging with 5V USB adapter only.3.The color of the picture may vary depending on the display. Please refer to the actual object.