Are you still awake by your neighbour's dog? Choose us, choose a quiet life! Specification: Product Name: Anti Barking Device Power: USB Input Voltage: 3.7V Input Current: 40mAh Battery: 1500mAh Waterproof IP Rating: IPX4 Sensor: Sound Detection Sensor Distance: Up to 50ft Ultrasonic Frequency: 13KHZ-36KHZ Charging: It displays“C” when charging, “F” when fully charged, “L” when out of power (display time in 5 seconds). How to use: 1. Switch on: Press and hold the on/off key for 2s, "beep" once, the screen flashes blue numbers. 2. ''T'' key means ''Test'', press the key to test whether the product can work normally, and the product will emit a "beep" and " The product will emit a "beep" sound and a "simulated ultrasonic" sound, indicating that it is working normally. If there is no sound when the test mode is pressed, check to see if the product has enough power. (When the product has no power, "L" will be displayed for 5 seconds) 3. Press "S" to adjust the sensitivity, Level 1: 6.5-10 ft, Level 2: 20 ft, Level 3: 33 ft. 4. Press "F" key to adjust the frequency, Level 1: ultrasonic frequency 13KHZ-15KHZ, Level 2: ultrasonic frequency 19-21KHZ, Level 3: ultrasonic frequency 33-36KHZ Packing List: 1 x Anti Barking Device 1 x USB Cable 2 x Mounting Screws and Anchors 1 x User Manual NOTE: If the dog is deaf or hearing impaired, it may not react to the Bark Control. Occasionally change position, sensitivity, and frequency to prevent the dog from adapting. For best results, the area between the anti-barking device and the dog should be free of any large obstacles. For more details on the use of the product, please read the instructions carefully!?Warm Tips for Usage?: The dog barking deterrent device is not applicable to the following situations: aggressive dogs, noisy surroundings, hearing-impaired dogs, more dogs together, dogs under 6 months or over 8 years. ?Durable Power & Waterproof?: The new anti barking device come with a well-designed mini shape. Equipped with a 1500mAh battery, the anti-bark device can continuously work for 30 days after fully charged. (The digital display shows ''C'' when charging and ''F" when fully charged.) Designed for easy hanging/mounting on a tree, wall or fence post to stop small dogs barking (within range), IPX4 waterproof design is suitable for use anywhere, providing you with a quiet environment. ?Safe for Dogs and Humans?: The ultrasound will not cause any interference or harm to human, (NOTE: The bark control device has some noise, so you should put the bark control device away from humans) but dogs will be sensitive to these ultrasounds. The dog barking device has 3 frequency levels that can be adjusted, 3rd levels for the highest frequency: 33-36KHZ, please adjust the frequency to the appropriate level to get the best results. ?Upgraded Rechargeable Version?: The 2024 updated ultrasonic dog barking deterrent makes you handy when training your dog. The barking control device automatically emits high-pitched sounds that only dogs can hear. Once the dog stops barking, the ultrasonic bark control automatically stops emitting ultrasonic sounds. And include the USB Cable, it can be recharged anytime and anywhere to avoid the trouble of putting the battery. ?Small Body, Big Energy?: The dog barking device has a 3 gears range adjustment, with the 3rd gears reaching a range of 33 feet, which is suitable for both indoor and outdoor use within the effective range. Anti barking device has been tested to work best within 33 feet, and the smaller the range, the better the results. If your or your neighbour's dog is barking too excitedly, keep the anti-barking device nearby and you will have a quiet resting environment.