Feature: 1. Lightweight and Cute: The dog trainer is light in weight and has a cute design, making it an excellent choice for an outdoor bark stop for dogs. It is not recommended for indoor use. 2. Adjustable Design: The ultrasonic dog bark deterrent makes a harmless but effective sound to control excessive barking, ideal for small, medium and large dogs. 3. Powerful Features: This ultrasonic bark control device can catch 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 be hung from trees, wall or fence posts. Add some style to your outdoor decor and bring peace to your family and neighbors at home and on camping trips. 5. ABS Material: Barking control device adopts high grade ABS material, which is waterproof and durable, and can withstand various weather conditions. Specification: Item Type: Ultrasonic Dog Bark Deterrent Material: ABS Parameter: Battery Type: Lithium ion Battery Battery Model: 18650 Battery Capacity: 1200mAh (Included). Package List: 1 x Ultrasonic Dog Bark Deterrent1 x Manual2 x Expansion Tubes2 x Screws