For smaller dogs. System weighs 40% less than the YS500. Low to medium power - Bark activated "no-bark collar" for small to medium size dogs.

• "Bark Recognition" that distinguishes a dogs barking from its surrounding ambient noises
• Non-electrical stimulation vibration warning prior to the stimulation
• 6 intensity levels (2-7) for a wide variety of dispositions
• Fits dogs as small as 10 lbs (Receiver weight : 4.0 ounces)
• 2-hour rapid charge Lithium Polymer batteries
• LED battery life Indicator
• Fully waterproof
• No bark collar with strap
• Lithium Polymer Battery Charger
• Plastic dummy points
• Owner's manual