1、Large Capacity Battery: The 300mAh lithium battery has a large capacity design, which has a larger capacity than most products, and can be used for up to 1‑3 days (60 days of long standby). 2、Operation Without Remote Control: The dog bark control collar works in automatic mode through a combination of sound and vibration, without remote control. 3、Adjustable and Durable: This vibrating and durable reflective nylon collar can be adjusted according to your dog's size. Suitable for all dogs from 6cm to 35cm in diameter. 4、Smart Barking Collar: Only the barking of your pet can activate the vibration. Prevent other dogs from barking to activate the collar and cause harm to your dog. 5、Adjustable Sensitivity: 7 sensitivity levels are provided for all possible barking volumes and different environments, ensuring that you can set the correct sensitivity. Select the mode (sound/vibration or sound+vibration) and sensitivity. Item Type: Dog Barking Collar Material: ABS + Nylon Size: Approx. 6.5 x 2.5 x 3.5cm/2.6 x 1.0 x 1.4in Adjustable Range of Collar Diameter: Approx. 6-36cm/2.4-14.2in Battery Type: Lithium Battery (Included) Battery Capacity: 300mAh Charging Method: USB Charging Characteristics: 1. Simple and Elegant Appearance, Small Size, Equipped with Nylon Collar, Pets Can Wear, Easy to Wear. 2. with Life Waterproof Function, You Don't Need to Worry About Rain or Rain. 1 x Dog Training Bark Stopper 1 x USB Charging Cable 1 x English Manual