Suitable size: Product size of hand-held dog trainer: 13.75.52.5cm; small size, does not take up space, light weight, easy to carry; suitable for putting in your pocket and holding it when you need it; out for use PREMIUM MATERIAL: The material of this hand held dog trainer is made of plastic, which is safe and reliable, not easy to wear and tear, durable and can be used for a long time, repels the dog that barks at you, but is safe for the dog Ultrasonic Bark Stopper: This handheld dog trainer uses ultrasonic technology; it produces ultrasonic waves when applied; the frequency of the ultrasonic waves will stop your dog from barking; suitable for all breeds and sizes of dogs; the sound frequency is safe for pets and safe for people No effect on the ears; but don’t apply it for too long, it may not be effective on the dog Easy to operate: first open the battery cover, then put in the 9V battery (not included), turn on the switch, it can be used to train the dog, as long as the
