Function: 1. [Power indicator] Dog bark control device with low power indicator, when the battery is low, press the function button, the indicator will be red. USB rechargeable, the built-in 300mAh battery is fully charged in 1 to 2 hours and can be used normally for about 12 days. 2. [Safe Ultrasound] Effective bark deterrent from 15Hz to 120kHz. This bark control device emits ultrasound at 25kHz, above the range of human hearing, but easily attracts your dog's attention and makes them feel uncomfortable. Stop your dog's bad behavior at the touch of a button. 3. [2 frequencies] The ultrasonic bark repellent device emits 2 different types of ultrasound, fixed frequency fluctuating frequency and irregular ultrasonic frequency. You can choose different ultrasounds to avoid getting your dog used to simple frequencies. 4. [Outdoor use] Manual bark stopper with a wrist strap to fit your hand perfectly. 16.5ft control range, convenient for walking your dogs outdoors to train them to behave well in public and protect them from dangerous food, and you can also use it to stop dogs from approaching you. 5. [Beep function] The dog bark training device has a beep function button, press the beep button before each ultrasonic emission, and eventually your dog will build a conditioned reflex to the beep, you can stop his bad behavior by beep function without ultrasonic punishment. Specification: Item Type: Dog Barking Repellent Material : ABS Black colour Battery type : Li-polymer battery Battery model: 602025 Battery capacity: 300mAh (comes with built-in battery) Package List: 1 x Dog Bark Repellent 1 x Charging Cable 1 x Manual 1 x lanyard Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store