Features: 1.[Power Indicator] Dog bark control device with with low power indicator, when low battery, press the function button indicator will be red. USB rechargeable, built in 300mAh battery is fully charged in 1 to 2 hours and can be used normally for about 12 days. 2.[Safe Ultrasonic] Effective bark deterrent from 15Hz to 120kHz. This bark control device emits 25kHz ultrasonic, above the range of human hearing, but easily attracts your dog's attention and makes them feel uncomfortable. Stop your dog's bad behavior with the push of a button. 3.[2 Frequencies] Ultrasonic bark deterrent device emits 2 different types of ultrasonic, a steady frequency fluctuating frequency and an irregular frequency ultrasonic. You can choose different ultrasonic to avoid your dog getting used to simple frequencies. 4.[Outdoor Use] Handheld bark stopper with wrist strap that fits perfectly in your hand. 16.5 feet control range, convenient for outdoor dog walking to train them to behave well in public and guard them from unsafe food, also you can use it to stop dogs from approaching you. 5.[Beep Function] 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 their bad behavior with the beep function without ultrasonic punishment. Specification: Item Type: Dog Barking Deterrent Device_x000D_ Material: ABS_x000D_ Color: Black_x000D_ Battery Type: Lithium Polymer Battery_x000D_ Battery Model: 602025_x000D_ Battery Capacity: 300mAh (Shipped with Built in Battery) PackageList: 1 xDog Barking Deterrent Device 1 x Charging Cable 1 x Manual 1 x Lanyard Note This product is not waterproof, please do not put into water to clean.