Help keep your dog safe - vehicles will see your dog well in advance with this bright collar; fully adjustable between 19-24 inches. User friendly with 3 light modes – change the light between steady mode, rapid flashing, or slow flashing with just 1 click. USB rechargeable battery, lightweight, water resistant, sturdy & durable materials - The USB rechargeable battery (cable included) gives 4 hours of illumination per 1-hour charge. A charge that will last multiple walks. No need to replace the batteries! Perfect to use with our matching LED dog collars! – You and your dog will be even more safe and visible. No matter where you go, you and your dog will be seen. Guaranteed. HELP SAVE A DOG IN NEED - 5% of every purchase is donated to PoundWishes to help save a dog's life.