Features 1、[2 Modes] Dog bark collar provides effective sound (beep) and 7 safe vibration modes. It will help your dog correct his dog's barking behavior. 2、[Large Capacity Battery] Dog collar's lithium battery has a 300mAh high capacity design, which can be used for 1‑3 days normally (up to 60 days of long standby). 3、[Humanized Training Method] We provide a humanized, vibrating method to prevent barking in a cute and harmless way! Accurately trigger the dog bark collar. 4、[Adjustable Nylon Straps] The dog training bark collar's adjustable collars are 12‑56cm in length and are suitable for dogs of all sizes. 5、[Multiple Shells] Satisfy your pet's travel match, can pick out better colors in different scenes, make your dog fashionable and attractive, Specifications: Item Type: Dog Bark Collar Material: ABS, Nylon Size: Approx. 6.5 x 2.5 x 3.1cm/2.6 x 1.0 x 1.2in Battery Type: Lithium Battery (Included) Battery Capacity: 300mAh Charging Method: USB Charging Collar Adjustable Range: Approx. 12-56cm/4.7-22.0in Waterproof Grade: Life Waterproof, Can Prevent Rain, Can Not Be Immersed in Water Suitable Pet Type: Large, Medium and Small Dogs Function: Prompt Warning Sound, Vibration, Sensitivity Adjustment Package List 1 x Dog Trainer 1 x USB Charging Cable 4 x Shell 1 x English Instruction Manual