The Dogtra iQ VIBE No Bark Collar is the first vibration-only no bark collar for sensitive dogs with 3 levels of vibration duration, whether long or short. The iQ VIBE activates through the Sound Recognition Sensor and provides a vibration that is four times stronger than a cellphone vibration. The sensor distinguishes the dogs bark from the surrounding noises to help eliminate unwanted barking. The iQ VIBE is a rechargeable, ultra-compact receiver that is ergonomically designed with no contact points for dogs 10 pounds and up.