Almost unused. The sensor reliably detects your pet's excessive barking. For dogs with thick fur ➠ the sensor makes contact with the skin, ensuring a reliable response and effectively preventing barking. ◎ The vibration is transmitted, so adjust the collar to fit snugly but not too tight or loose♪ Color: Blue Weight: 53g, with 7 modes. Features a smart chip that won't react to other dogs. 2-hour charge provides 20 days of use. High-sensitivity sensor reliably detects your pet's excessive barking. Even for dogs with thick fur, the sensor makes contact with the skin, ensuring a reliable response and effectively preventing barking. Adjust the collar to fit snugly but not too tight or loose. Management Number: H