Anti Barking E-Collar No Bark Dog Training Shock Collar for Small Medium Dog Continuously shock your dog 7 times within 1 minute, bark collar will not enter into sleep mode for 1 minute, unlike a traditional electronic shock collars that train your dog to respond to pain. Stop unwanted barking with progressively increasing warning sounds and harmless static stimulus. For your dog's protection, the use of 6V safe voltage and intelligent humanized design can not only make the dog obedient, but also not harm the dog's body. Lightweight receiver with 1-5 sensitivity level to be adjusted to fit.