Feature: 1. Effective and Humane: Stops excessive barking with a safe high-pitched ultrasonic sound. 2. Versatile Design: Can be hung on a tree, placed indoors, or in the yard. 3. Durable and Waterproof: Designed for outdoor use, ensuring longevity and reliability. 4. Adjustable Sensitivity: Three sensitivity levels to suit different environments and distances. 5. Battery-saving Feature: Power indicator and \"Off\" setting to conserve battery life when not in use. Specification: Dual ultrasonic deterrent designed to effectively control and reduce dog barking. Ideal for all dog owners, it provides a safe and humane solution to excessive barking. Features: Effective and Humane: Stops excessive barking with a safe high-pitched ultrasonic sound. Versatile Design: Can be hung on a tree, placed indoors, or in the yard. and Waterproof: Designed for outdoor use, ensuring longevity and reliability. Adjustable Sensitivity: Three sensitivity levels to suit different environments and distances. Battery-saving Feature: Power indicator and "Off" setting to conserve battery life when not in use. Specifications: Colour: Green Material: Plastic Waterproof: Yes Batteries: 1500mA 3.7V Lithium Ion batteries required. (included) Package Weight: 190g / 6.7oz Package Size: 11.7*9.2*7.5*cm / 4.3*3.5*2.8in Package list: 1* Anti barking device 1* Instructions 1* lanyard 1* USB charging cable Package List: 1* Anti barking device 1* Instructions 1* lanyard 1* USB charging cable