Pet Products Ultrasonic Bark Stopper Dog Trainer Dog Repeller Indoor & Outdoor Black Normal Edition 1. Material: ABS 2. With wall hole 3. Use a 9V alkaline battery (not included) 4. The battery level and whether the product emits ultrasonic waves can be clearly seen on the screen 5. Filter out part of the external noise, reduce product malfunction, reduce battery consumption, and realize product power saving 6. Intelligent voice recognition is set up, the system will intelligently filter the near frequency of the dog's barking sound before triggering the product to produce ultrasonic waves 7. The normal version has three speeds: high, medium and low, and the frequency is not adjustable 8. The smart version has four gears, one is randomly generated frequency automatic conversion frequency, the other three gears are divided into three gears, high, medium and low, and the three gears can manually adjust the working frequency of the product , with 0-9 work Frequency adjustable 9. Product size: 104x37x93mm 10. Product Weight: 0.14kg Packing List: Ultrasonic Bark Control x1 Manual user x1 Wall nail x2 Screw x2