Feature: 1. With 2 Modes: Provide effective sound (buzzer) and 7 sensitivity adjustment modes. It will help your dog understand that barking is not ideal. You can correct your dog's behavior with this training dog barking collar. 2. 1‑3 Days Use Time: The lithium battery is designed with a 300mAh large capacity, which has a larger capacity than most products on the market, and can be used for up to 1‑3 days. (up to 60 days of long standby) 3. Humanized Training: A humanized way to prevent barking Accurately trigger the bark collar. You can walk in noisy places without worrying about the device being too late or triggering randomly. 4. Adjustable Nylon Strap: This dog barking collar is designed with adjustable nylon strap, and the adjustable collar length 12‑56cm / 4.7‑22in, suitable for large, medium and small dogs of all sizes. 5. Waterproof and Rainproof: The bark collar can be safely used indoors and outdoors in any weather conditions. When your dog splashes or plays in the rain, don't worry that the barking collar will be damaged. Specification: Item Type: Dog Bark Collar Material: ABS+Nylon Webbing Size: Approx. 6.5x2.5x3.1cm / 2.6x1x1.2in Battery Type: Lithium Battery (included) Battery Capacity: 300mAh Charging Method: USB Charging Adjustable Range of Collar: 12-56cm / 4.7-22in Waterproof Level: Life waterproof, rainproof, can not be soaked in water Suitable Pet Type: Large, Medium and Small Dogs Product Function: Warning Sound + Sensitivity Adjustment . Package List: 1 x Dog Bark Collar1 x USB Charging Cable1 x Conductive Measuring Lamp1 x English Manual Note: 1. Please read and follow the instructions in this manual. It is important to wear the collar correctly. When pets wear collars that are too long or too tight, they can cause skin damage. Wearing too long or too tight may cause stress and cause skin damage. This is often mistaken for burns.2. Don't tie the device tightly around the dog's neck.3. Do not leave the device on the dog for more than 12 hours.4. Change the collar on your pet's neck every 1 or 2 hours5. Adjust 8 gears (0~7) to 0 to turn off this function, the sensitivity is 7 gears (1~7)6. It is recommended that you start using the impact function from the weakest level.7. Please allow some errors due to manual measurement.