DescriptionAre you looking for a professional and affordable anti-barking device? Are you looking for a sturdy, trustworthy tool that can do multiple tasks? If so, please look no further! Our professional anti-barking device will definitely meet your needs. It is one of your best choices.Features-Color: Dark green-Material: ABS -Size: About 10.00X8.00X3.50cm/3.93X3.14X1.38inch -Power: USB -Input voltage: 3.7V -Battery: 3.7V 1500mAh -Ultrasonic frequency: 15KHZ-30KHZ -Working distance: 50 feet/15 meters - This is an effective behavior modification tool that can help you train your dog to reduce barking. - Reasonable design, simple structure, convenient charging, safe and durable. - Small and light, easy to wear, comfortable and durable, it will be your good choice of pet supplies. - Help you effectively correct inappropriate behaviors of your pets, and better maintain the safety of you and your dog. - It has 4 frequency range to choose, according to different pet or animal category and size to choose.