*Features*: *3-Level Anti-Bark Frequency*:This ultrasonic anti-barking device provides 3 adjustable frequency levels,including 15KHz for small dogs,20KHz for docile dogs,30KHz for large and naughty dogs. With the built-in speaker and max 32.8ft sensing distance,the device can efficiently help your dog curb barking. *Easy Operation*:Simply long press the power button to turn on the device. The blue light will start flashing in powering on state and blink every 6S in stand-by state. The red light will stay on for 3S once sensing dog barking and start flashing when the device is in low battery. For charging,the indicator light flashes green light and stay static light when fully charged. *Long Working Time*:Built in 1500mAh rechargeable battery,the dog bark control device can work about 40 days based on trigger 100 times per day. Come with a type-C charging cable,able to recharge the device about 4 hours for fully charge via adapter,laptop,power bank and etc.. *Safe For Human & Pet*:This anti dog control device uses ultrasonic technology to intervene in dog barking,which is friendly to human beings and can be heard by your dog but cannot hurt it. No poison and chemical. No impact on humans or other pets. *IPX4 Waterproof*:With fine workmanship and made of upgraded ABS material,the dog bark controller is sturdy and has IPX4 waterproof performance. No more worry about mounting it outdoor. Great to be mounted at garden fence,home,dog house,tree etc. with the included screws and anchors. Friendly Reminder: 1. The maximum detection range is 32.8ft,if the dog is more than 32.8ft away from the device,it will not be triggered to work by dog bark. 2. The device broadcasts ultrasound to stop the dog from barking. If the dog has a hearing issue,the device may not work as expected. 3. The device is for 6-month to 8-year-old dogs. 4. Using the device against aggressive dogs is not recommended. 5. Using one device against two or more barking dogs at once is not recommended. Please use for one barking dog at a time. 6. Using the same Ultrasonic frequency at the same dog for 10 days or more is not recommended. The dog may have resistance to the same ultrasonic frequency. Please change the ultrasonic frequency every 7-10 days. 7. Please check the battery power every month,charge it if the power is too low. *Specifications*:  Product Type: Ultrasonic Anti-Barking Device  Color Available: Black, Green  Material: ABS  Powered By: Built-In 3.7V/1500mAh Rechargeable Battery  3-Level Ultrasonic Frequency: 15KHZ; 20KHZ; 30KHZ  Waterproof Rating: IPX4  Working Distance: 7-10m/22.97-32.8ft  Charging Time: 4Hrs  Working Time: About 40 Days(Based On 100 Times Per Day)  Recommended Mounting Height: 1.65-1.97ft  Recommended Dog Age: 6-Month~8-Year-Old  Charging Port: Type-C(Please plug in the charging port with 5V/1A; 2A and above current is not recommended)  Type-C USB Cable Length: 50cm/19.7in  Item Size: 11x7.5x4.5cm/4.33x2.95x1.77in  Item Weight: 135g/0.3lbs  Package Size: 12*10*5.5cm/4.72*3.93*2.16in  Package Weight: 176g/0.38lbs *Package Lists*:  1 x Anti-Bark Device  1 x Charging Cable  2 x Self-Tapping Screws  2 x Plastic Anchors  1 x User Manual