The length of the collar can be adjusted size (for large dogs) installed after the battery will drop a long sound will stop after the bark device is in the working state but the red light is not bright!

Short and powerful! The two small holes in the middle of the two metal probes・ and the red light will be on・ and the sound of the metal will be heard at the same time・ so it will only be used for a while. ・ May be no electricity・ it is recommended that you change a new battery to start using the barker\'s customer friends・ please be sure to carefully observe the dog next to the response to the bark device Oh・ if there is more electricity called the case・ Please immediately remove the barker・ be sure to slowly train the dog・ to make it clear that wearing a bark is not barking・ if the bark will be punished! After all・ the dog is only a tool・ electric dog is not the purpose・ but by wearing a bark device this way to achieve the purpose of dog barking