Feature:1. Safe Dog Control Device: Dog anti-barking devices emit an ultrasound of 15-30kHz, which exceeds the coverage of human hearing but can easily attract the dog's attention without hurting your dog like a dog whistle.2. Two Different Modes: Drive away stray dogs with high-power ultra-sonic, or stop dogs from barking with flashing LED lights + ultra-sonic. The LED light can also be used as a flashlight for walking your dog at night.3. Multi-functional: This dual-head trainer also stops your pet's bad behaviors such as fighting, biting, eating hazardous things, etc. Our upgraded barking stopper is an effective tool without causing injury to your dog.4. Long-Lasting Use: This deterrent tool is equipped with an 800mAh rechargeable battery and provides a full charge in 40 minutes for about 2 hours of continuous work. The independent and large keys make it easy to use.5. Portable Design: The professional dog anti-barking device is sleek, ergonomically designed to provide a comfortable grip, and compact enough to fit easily in your pocket. It is easy to use both indoors and outdoors.Specification:Structure: ABSColor: BlackBattery: 800mAhItem Size: 12.3 * 5.2 * 2.7cm/4.84 * 2.05 * 1.06inItem Weight: 85g/3ozPackage Size: 14.1 * 10 * 3cm/5.55 * 3.94 * 1.18inPackage Weight: 123g/4.34ozPackage List:1*Dog Barking Control Device1*Charging Cable1*Lanyard1*Manual