I purchased this for training, but my dog doesn't usually wear a collar, so they didn't like it, and I'm selling it. It's almost new. I used it on a Corgi, and it was very effective in curbing excessive barking. - Brand: dogrook - Type: Anti-Bark Collar - Colors: Black & Blue - Accessories: USB charging cable ☆ How to Use ・Power on/off: Long press the power button ・Test mode: After turning on the power, press the power button and set the number to "0". When you speak in a loud voice, you can test it with vibration → sound → vibration. ・M button: Switch between green (normal vibration) and red (strong vibration) ・Dog voice sensitivity: You can change whether it reacts to small voices or only loud voices with numbers 1-5. 【Product Description】 Anti-bark training: DogRock's anti-bark collar for dogs can teach your dog to relax and trust, rather than be afraid. With this anti-barking device, you can perform very effective and painless anti-barking training. Vibration & Sound: This dog anti-bark collar combines two vibration modes and 7-level volume adjustment, allowing you to gradually progress with anti-barking training. The dog vibration collar instantly and automatically provides feedback tailored to your dog. Smart and detailed settings: The dog vibration collar is equipped with a smart microphone. It only reacts to your dog's barking. You can adjust the 5-level sensitivity of the anti-bark collar to match the surrounding sounds. Rechargeable & Waterproof: The bark control collar has a long-life battery (up to 14 days) and is waterproof, able to withstand rain, snow, and splashes. Therefore, the dog bark control collar can be used both indoors and outdoors. Compatible with various sizes and breeds: The dog bark control collar is compatible with dogs from 3.6kg to 49.8kg, and the collar can be adjusted up to 55.8cm. The dog bark control collar, which is compatible with small, medium, and large dogs, comes with a vibration stick cover for use on long-haired breeds. DogRook Anti-Bark Collar – Rechargeable Dog Barking Prevention Device Waterproof Dog Vibration Collar for Small, Medium, and Large Dogs 5-Level Adjustment Anti-Barking Device Dog Training Dog Barking Prevention Thank you for viewing.