English: Product Details Features: · The built-in USB charging battery can last for about 14 days, solving the problem of frequent battery replacement. · The built-in receiver has an automatic protection mode. If it is activated seven times within one minute, the collar will be deactivated, and it will start working again after one minute. · The collar with shell has adjustable sensitivity and three training modes (beep, vibration, impact). These functions are adjustable from 0 to 7 degrees. The gentle shock is safe, or you can choose the no-impact mode to effectively stop according to your needs without causing any harm to your dogs. · Intelligent vibration detection can replace sound detection to prevent false triggering. Only the sounds of your dog can trigger the collar, while the sounds of other dogs nearby cannot trigger it. · The collar can be adjustable. Specifications: Material: ABS + Nylon Ribbon Mode: Vibration, Vibration, Sound Sensitivity: Grade 7 Waterproof: IPx4