🦴【4 Modes & 33 Feet Dog Training Device】The anti barking device is designed with speakers and 4 adjustable modes. Level 1 - variable frequency (15-30KHz). Level 2 - 20KHz frequency. Level 3 - 30KHz frequency. OFF level - stop switch. This dog training device can effectively stop the dog from barking up to 33 feet away. 🦴【Rechargeable & Durable & Waterproof】 Built-in 1500mAh lithium battery, the dog bark stopper can standby for 30 days after 5 hours of full charge. With IPX4 waterproof and hanging rope design, the anti barking device can be placed or hung anywhere indoors and outdoors. 🦴 【Safe Anti Barking Device 【Safe】The ultrasonic dog bark control device uses high-pitched ultrasonic technology is harmless to pets which is higher than the human hearing range, but it will attract the dog's attention without painful stimulation. Package Included: 1*Anti Bark Device, 1*Dog Whistle, 1*USB Cable, 2*Mounting Screws and Anchors, 1*User Manual 🦴 【Effective on Most Dogs】The ultrasonic dog