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 convenient to carry; It is suitable to be placed in a pocket and hold it when needed; Come to use Quality material: the material of this handheld dog trainer is plastic, safe and reliable, not easy to fray, durable, can be applied for a long time, to drive away barking dogs after you, but safe for the dog Ultrasonic Bark Stopper: This handheld dog trainer uses ultrasonic technology; When applied, it will produce ultrasonic waves; Ultrasonic wave frequency will prevent your dog from barking; It is suitable for all breeds and sizes of dogs; The sound frequency is safe for pets and has no effect on human ears; But it cannot be applied for too long, it may be ineffective for the dog Easy to use: open the battery cover first, then insert a 9V battery (not included), turn on the power. switch, you can use it to train the dog, as long
