LED Light: The LED Dog collar makes it easy for your dog to be seen at night. 3 Lighting Modes: Switch between 3 different lighting modes with simply 1-click - Rapid Flashing, Slow Flashing & Steady Mode. USB Rechargeable Battery: The USB rechargeable battery (cable included) gives 5 hours of illumination per 1-hour charge. A charge that will last multiple walks. No hassle with replacing batteries, it's well-constructed and durable. 5 Sizes & 5 Colors: Choose between 5 different sizes and 5 different colors.