4-Head Dog Bark Control Device – 3-Level Ultrasonic Adjustable Anti-Bark Trainer Option:4 Head Size: 29x6

Size: 29x6

- Weak light is always on

Rechargeable battery: built-in 1

Material: Plastic + Metal

4-Head Dog Bark Control Device – 3-Level Ultrasonic Adjustable Anti-Bark Trainer Option:4 Head Size: 29x61. This dog barker emits ultrasonic waves in a safe and gentle way to stop dogs from barking without causing any physical harm to the dog. 2. 3 The frequency is adjustable and suitable for dogs of different sizes. The first mode is the audio mode, which emits a variable frequency of 10 16KHZ, suitable for small or sensitive dogs. The second mode is the first level ultrasonic mode, which emits 20KHZ and is suitable for docile or medium sized dogs. The