Check the listing for details. Automatic Ultrasonic Bark Control Model: U11. Condition: New. Listed at 29.99 USD. NEW OPEN BOX ITEM As show in the Gallery Pictures. like new item. Series Buyer purchase this itemSAME DAY SHIPPING BY USPS Description 🦴Anti Barking Device is a pet-safe, human-friendly and effective tool to stop dogs barking. ❓Why choose this stop dog barking device:✔ Pet-safe and Humane: emit safe sonic sound to stop barking✔ Wide Effective Work Range: up to 50 feet✔ Dual Sonic Sound Speakers: more powerful sonic sound to stop barking✔ 3 Adjustable Frequency Modes: 23HZ, 25HZ, 23-27HZ automatic frequency conversion mode✔ Rechargeable and Durable: charged by usb port of laptop, charger or power bank. Take it away and use it anytime.✔ Rapid Charging and endurance: fully charged in 4 hours, working for up to 5-7 days.✔ Work on All Breeds and Sizes of dogs. Use it with traning, get better efffect. ❓How to test:Activate the device. Hold the device in arm's length away from your mouth. Say " Woof " loudly towards the Microphone. The green light will be on and emits sonic sound indicating that it's functioning properly. 🦴3 Adjustable Frequency Modes:- Mode 1: 23HZ, normal sonic sound for small or sensitive dogs- Mode 2: 25HZ, strengthened sonic sound for medium or docile dogs- Mode 3: 23-27HZ, auto conversional sonic sound for large or naughty dogs 🔋Light Indicator:! Power on: green light is on and beep sound prompts once! Power off: red light flashes 2 times and beep sound prompts 2 times! Power low: red light is on! Charging: red light on means charging, and green light means charged fully 🎁Packaging List:1 x Anti Barking Device1 x User Manual1 x USB Cable