Features: < / p > < p > It automatically emits ultrasound that the dog can hear. The built-in sensor detects dog barking (the ultrasonic anti-bark device automatically detects dog barking within 50 feet) and effectively trains dogs Stop excessive and loud yelling. Once the dog stops barking, the Ultrasonic Bark Controller automatically stops producing ultrasonic sound < / p > < p > No Noise Pollution: The Mini Bark Controller uses ultrasonic technology to allow dogs humans to hear small sounds. When the sound starts, the dog notices it and the ultrasound does not inflict substantial punishment on the dog. Other families Members or neighbors are not afraid of being touched < / p > < p > dog bark control shells are UV resistant and do not fade easily. It can be easily hung on trees, interior walls, exterior walls or fences to prevent dogs from barking. The speaker is IP45 waterproof and effectively resists external splashes < / p > < p > Sensitivity adjustment: The peel control has 4 sensitivity options. Grade 1 sensitivity is the lowest and Grade 4 sensitivity is the highest. The most suitable equipment can be adjusted according to the use of the environment < / p > < p > wide frequency range: the ultrasonic anti - peeling device is available in 4 frequencies. Each dog can choose the appropriate frequency. If the dog is unresponsive for a long time, change the frequency. 15 / 20 kHz frequency is the most common Frequency used by dogs to stop barking < / p > < p > with the increase in ultrasonic power, the coverage is wider and the ultrasonic stimulation is stronger < / p> 100% safe for humans and animals digital display, USB interface charging features: < / p > < p > material: plastic < / p > < p > load: USB < / p > < p > package size: 12.5*9*5cm < / p > < p > package weight: 200g < / p > < p > Packing list: < / p > < p > 1 * Anti-peeling device < / p > < p > 1 * USB charging cable < / p > < p > 2 * Mounting screws and anchors < / p > < p > 1 * Manual < / p >Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain difference in color, depending on the physical object received Delivery Quantity: (according to the main image)