Feature: * Both Barking Control & Training - Ultrasonic Anti-Bark Dog Training Device is a two-in-one device for pet training and anti barking. * Deterrent mode: Emit a higher intensity ultrasonic sound while the flashlight flashes as a warning to prevent other dogs from approaching you. * Training mode: Emit a lower intensity ultrasonic sound to assist in daily dog training such as stop excessive barking, fighting, biting, and correct other unwanted behaviors * Three Frequency Modes - Dog ultrasonic bark control device can emit 3 different kinds of ultrasonic waves: fixed & variable & random frequency. Pressing and hold the ultrasonic button after adjusting the mode you needed，and Please do not use the device through obstacles. * Night LED 3W Flash Lighting - Bark control deterrent is equipped with night lighting, which is suitable for use even when walking the dog outdoors at night. The torch can be turned on separately, used as an entertainment tool for dogs and cats, and an independent strong light 3W flashlight with three modes: long light, SOS, and burst flash. * 32.8 feet Wide Control Range - The effective range of dog barking device can reach 32.8 feet/10m, which is very suitable for indoor or outdoor. Equipped with dog barking control devices indoor, you no longer have to worry about dangerous behaviors such as your dog gnawing on the sofa at home, barking at strangers at the door, or fighting outside. * Curated sound wave design: Dog-friendly ultrasonic waveform designed for dogs'hearing characteristics makes this dog barking control device outdoor easier for dogs to understand and learn. Indoor &Outdoor & Easy to Use * Correct unwanted behavior: The pet gentle anti barking device UT01 emits an ultrasound of 25 KHZ, which will not affect humans but can grab dogs’ attention without worrying about hurting your dogs. When the dog stops inappropriate behavior, please give the dog food, threats, or petting to reinforce the training's effect. The bark control device is not applicable for the following situations: aggressive dogs, hearing-impaired dogs, dogs under 6 months or over 8 years * Ultra battery life and rechargeable - for up to 4 months of use without charging it again (Suppose use 10 times a day and 10 seconds at a time). Only need 1-2 hours to fully charge. Specification: * Material: plastic * Work range：10M * Charge time: 1-2hours * Size:140MM*30MM Packing list: * 1* Dog Training and Anti Barking Device * 1* wrist strap * 1* USB cable * 1* product manual