Smart Training Modes: The Dog Bark Collar features an adjustable sensitivity system and 3 training modes (beep / vibration / shock) with 0-7 adjustable levels. It is optional for shock or no-shock, vibrate or no-vibrate. Safe & Effective: The built-in receiver of this No Bark Collar has an automatic protection function to deactivate the Barking Collar if it continuously be activated for 7 times within 1 minute. It will enter sleep mode for 1 minute to avoid hurting your dog. Intelligent Detection Chip: Our Anti Bark Collar uses the latest vibration sensor technology to prevent false triggering. Only your dog's barking combined with vibration will trigger the sensors while other dogs' barking will not. This smart dog barking control device can help your dog avoid unnecessary response of the bark collar. Adjustable And Reflective Collar: Adjustable nylon collar; Fit for small, medium and large sized dogs. Reflective collar keeps dog in sight and safer at night. Warranty & Guarantee: Get a top quality Dog Training Collar at an economical price and never worry about warranty. If there is any problem with the product, please feel free to contact us, we will provide a replacement or a full refund.