Overview: Anti Barking Device: Ultrasonic Dog Trainer is a great device for Dog Training and Dog Bark Control. Ultrasonic frequency (25 KHZ) has a certain effect on dogs and helps you correct their behavior. It?s effective for dogs of all types and sizes of age 6 months to 8 y.o. Convenient Easy To Use: Small in size the Bark Control Device fits perfectly in the hand. You can carry it in your pocket. Anti barking device starts to work with just pressing a button. When the ultrasonic button is pressed for more than 8 sec, it shuts off not to harm your dog. It?s 100% safe among bark control devices. Handheld Portable: Since our antibark device for dogs is handheld and with a wrist strap, it can be used anywhere to train your dog: at home, the park, in your car. It also stops other dogs from approaching you while walking, jogging, or cycling. 3 modes LED Flashlight : 1nd gear ultrasonic mode to assist in daily dog training such as stop excessive barking, fighting, biting, and correct other unwanted behaviors, 2nd gear ultrasonic LED mode will not only emit an ultrasonic sound, but it will also quickly LED flash the bright LEDs and stop a dogs? behavior. 3nd gear the bright flashlight can also be turned on and used to light your way home. Professional Tips: Some dogs may be afraid or dislike this sound and will not stop barking at first, so please allow up to 2 weeks for training.If it still doesn?t work after two weeks of training, or if you don?t like it and feel it?s not worth your money, we will refund your full payment without a doubt. If you encounter any problems during use, please contact us, and we will try our best to serve you. Product information: Color: black, gray Material: Plastic Applicable to: dogs Battery capacity: 1200mAh Ultrasonic distance: 5M Size: 67 * 40 * 126mm Packing list: Dog driver * 1 charging cable * 1