Features 1、[Upgraded version] Ultrasonic anti-bark device can automatically detect bark up to 50 feet. The barking control device automatically emits high sounds that only dogs can hear. After the dog stops barking, the ultrasonic barking control will automatically stop sending out ultrasonic waves. 2、 [Safety for dogs and humans] Ultrasound is harmless to pets and completely inaudible to human ears, so the device can be used safely. 3、 [Working method] Can be hung on a tree, indoor, outdoor wall or fence to prevent dog barking (within range). When the luxurious outdoor ultrasonic barking alarm clock detects excessive barking, the microphone will respond to the barking and activation components. 4、 [Internal design] Built-in rechargeable battery, can be used continuously for one month. Waterproof shape, so you can install it anywhere with screw mounting. 4 adjustable levels of sensitivity and frequency, so you can adjust any level you want. 5、 [Waterproof design] Special green, durable and waterproof, very suitable for outdoor use. Add some style to your outdoor decoration to keep your family and neighbors quiet at home and while camping. Specifications Color: green Material: ABS Waterproof level: IP45 Working distance: 50 feet / 15 meters How to use it : The device can be charged in three hours and will work continuously for 30 days . When charging the device ,the digital display will show the power level and continue to flash until it is fully charged .When the product is fully charged ,the digital display will show a“4” . Before turning on the device unplug the USB charger. Turning the device ON-OFF To turn device ON press the“POWER” button down for 3 seconds and it will beep once with the digital display flashing a green number which will then disappear . To Turn device OFF press the“POWER”button down for 3 seconds and it will beep twice and turn itself off. Settings: .The digital display shows the levels ofsensitivity and Frequency. .You can choose to adjust the sensitivityfrom 1-4 by constantly press the Sensitivitybutton . Level 1 is the least sensitive and level 4is the most sensitive. .You can choose to adjust the ultrasonic Frequencyfrom 1-4 by constantly press the Frequencybutton. Level 1-ultrasonic Frequency 15KHZ ,digital display 1 with 6seconds Level 2- ultrasonic Frequency 20KHZ ,digital display2 with 6seconds Level 3- ultrasonic Frequency 30KHZ ,digital display3 with 6seconds Level 4- ultrasonic Frequency will emit for 1-3 level 3 different ultrasonic frequency sounds with 6seconds ,digital display 4. Package List 1 * Ultrasonic Anti Barking Device