Features: 1.2 Modes: This collar can provide effective sounds (buzzers) and 7 safe vibration modes, you can use this training collar to correct your dog's behavior. 2.300mAh Battery: Dog barking collar has a built in 300mAh lithium battery, with a large capacity design, which can be used for up to 1?3 days (up to 60 days of long standby). 3.Good Performance: The pet training collar uses a USB charging plug, built in microphone trigger, sensitivity adjustment, practical dog training supplies. 4.Adjustable: Dog collar nylon strap, adjustable collar length 6?36cm/2.3?14.1in, easy to adjust to a suitable neck circumference, suitable for all sizes of dogs. 5.Waterproof: Life waterproof bark control collar can be used safely in any weather conditions indoors and outdoors, don't worry about the collar being damaged.Specification:Item Type: Dog Barking CollarMaterial: Plastic + NylonProduct Size: Approx. 6.5 x 2.5 x 3.5cm / 2.6 x 1 x 1.4inBattery Type: Lithium Battery (Shipped with Built in Battery)Battery Capacity: 300mAhCharging Method: USB ChargingAdjustable Range of Collar: Approx. 6-36cm / 2.3-14.1inWaterproof Grade: Life Waterproof, Can Be Rainproof, Can Not Be Soaked in WaterSuitable Pet Type: Large, Medium and Small DogsProduct Function: Warning Sound + Vibration + Sensitivity AdjustmentPackageList:1 xDog Barking Collar1 x USB Charging Cable1 x Conductive Measuring Lamp1 x English ManualNote1. 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 hours.5. Adjust the vibration of 8 gears (0~7) to 0 gear 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. Manual measurement, please allow 0.4?0.7in error.