Product Description: Train your dog to stop excessive barking easily and painlessly. The Petrainer PET850 bark collar offers perfect bark technology. The bark control collar is activated by a vibration sensor and microphone, this prevents unintentional corrections. It also ensures that the bark collar will only activate if the dog wearing the bark control collar starts barking or making other nuisance level noise, ensuring your dog is never confused by a correction occurring accidentally. Bark Collar Features: 1. Rechargeable and waterproof anti bark collar 2. Easy testing method to ensure bark collar is operating properly 3. Auto protection mode after delivering stimulation 5 times 4. Dual activation avoids accidental triggering due to impact, vigorous head shaking and other dogs barking 5. On/Off switch, low battery and mode display 6. With Multi-Color LED Battery Life Indicator 7. High quality heavy duty buckle 22 inch strap 8. 6 intensity levels (2-7) for a wide variety of dispositions 9. Vibration Mode (V) warning prior to the stimulation 10. 7 sensitivity levels (1-7) adjustable for different dogs and environments Package Contents: 1 x Bark control collar 1 x Heavy duty buckle strap 1 x Charger adapter 1 x Charging Cable (USB compatible) 2 x Long/short collar probes 1 x Tester light bulb 1 x Manual.