Suitable size: the size of the portable dog trainer is 13.7 x 5.5 x 2.5 cm/ 5.39 x 2.16 x 0.98 inch; It is small in size, does not take up space, is light and easy to carry. It should be put in a pocket and held when needed. Take Action Quality Material: The material of this portable dog trainer is plastic, safe and reliable, not easy to fray, durable, can be applied for a long time to hunt dogs that bark at you, but harmless to the dog Ultrasonic Bark Stopper: This portable dog trainer uses ultrasonic technology; When applied, it generates ultrasonic waves; Ultrasonic wave frequency prevents your dog from barking; It is suitable for all breeds and sizes of dogs; The audio frequency is safe for pets and has no effect on the human ear. But it cannot be used for too long, it may be ineffective for the dog. You can use it to train the dog, as long as the battery is charged, it can work normally and can be used as a flashlight if necessary. Dogs are not allowed to bark; It can be used as
