Welcome to Yitaoju Co., Ltd. Features: 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. Specification: Item Type: Dog Barking Collar_x000D_ Material: ABS + Nylon_x000D_ Size: Approx. 6.5 x 2.5 x 3.5cm/2.6 x 1.0 x 1.4in_x000D_ Adjustable Range of Collar Diameter: Approx. 6-36cm/2.4-14.2in_x000D_ Battery Type: Lithium Battery (Included)_x000D_ Battery Capacity: 300mAh_x000D_ Charging Method: USB Charging_x000D_ Characteristics:_x000D_ 1. Simple and Elegant Appearance, Small Size, Equipped with Nylon Collar, Pets Can Wear, Easy to Wear._x000D_ 2. with Life Waterproof Function, You Don't Need to Worry About Rain or Rain. PackageList: 1 x Dog Training Bark Stopper 1 x USB Charging Cable 1 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._x000D_ 2. Don't tie the device tightly around the dog's neck._x000D_ 3. Do not leave the device on the dog for more than 8 hours._x000D_ 4. Replace the collar on the pet's neck every 1 or 2 hours._x000D_ 5. Make sure that the silicone probe is in contact with the dog's skin. The hair between the probe and the skin may weaken this effect. If necessary, it is recommended to shave the hair under the dog's neck._x000D_ 6. The collar is not a chew toy. Don't let your dog chew or bite it._x000D_ 7. Please allow 1?2cm/0.4?0.8in error for manual measurement