Dogtra No Bark Collar: * Designed for a small to medium sized dog * Bark Recognition * Distinguishes a dog"s barking from surrounding ambient noises * Non-electrical stimulation vibration warning prior to the stimulation * 6 intensity levels (2-7) for a wide variety of dispositions * 2-hour rapid charge Lithium Polymer batteries * LED battery life indicator * Fully waterproof * Model# YS300