Humane & Harmless - The dog bark collar has 3 types of modes, beep, vibration, shock with adjustable levels, and the sensitivity can be adjusted too. It with 7 adjustable sensitivity levels can effectively train your dogs.You can select a suitable sensitive level and a suitable model for your dog as needed to effectively stop barking without hurting them. Dog bark collar uses the latest Intelligent chip for barking vibration detection instead of sound detection.Only your dog's barking can trigger the no bark collar,prevent false triggering from other dogs' barking nearby. Smart Barking Detection Sensor - Vibration detection instead of sound detection, which prevents false triggering. Only your dog's barking can trigger the collar while other dogs' barking nearby cannot trigger it. USB rechargeable design can easily to charge with your laptop or power bank.Fully charged only need 1 hour can support up to 10-14 days of use.Rainproof design is available for both indoor and outdoor use in different weather. Bark collar can be adjusted the length and tightness to fit all small/medium/large dogs.The adjustable strap is made of high quality reflective nylon collar which will ensure the safety of your dog in the darkness.