Feature: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 13 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 1256cm 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,Specification:Item Type: Dog Bark CollarMaterial: ABS, NylonSize: Approx. 6.5 x 2.5 x 3.1cm/2.6 x 1.0 x 1.2inBattery Type: Lithium Battery (Included)Battery Capacity: 300mAhCharging Method: USB ChargingCollar Adjustable Range: Approx. 12-56cm/4.7-22.0inWaterproof Grade: Life Waterproof, Can Prevent Rain, Can Not Be Immersed in WaterSuitable Pet Type: Large, Medium and Small DogsFunction: Prompt Warning Sound, Vibration, Sensitivity Adjustment.Package List:1 x Dog Trainer1 x USB Charging Cable4 x Shell1 x English Instruction ManualNote:Please allow some errors due to manual measurement.