DOG REPELLER ULTRASONIC ANTI-BAKER Function: 1. LIGHTWEIGHT AND CUTE: The dog trainer is lightweight with a cute design, making it a great choice to keep bark outdoors for dogs. Not recommended for indoor use. 2. Adjustable Design: The ultrasonic dog bark repeller makes a harmless yet effective sound to control excessive barking, perfect for small, medium and large dogs. 3. Powerful Functions: This ultrasonic bark control device can catch a dog barking in the area covered by the system, stopping your own dog or your neighbor's dog from barking. 4. Simple Installation: The dog bark stopper is easy to hang on trees, walls or fence posts. Add some style to your outdoor decor and bring peace of mind to family and neighbors at home and at campsites. 5. ABS Material: The bark control device adopts high-quality ABS material, which is waterproof and durable, and can withstand various weather conditions. Specification: Item Type: Ultrasonic Dog Bark Repellent Material: ABS Parameter: Battery type: Li-ion battery Battery model: 18650 Battery capacity: 1500mAh (included) Package List: 1 x Ultrasonic Dog Bark Repellent 1 x User Manual 2 x Expansion Tubes 2 x Screws