Upgrading Anti Barking Device will solve the problem of your dog barking. Help him form a habit!With an Ultrasonic Dog Barking Deterrent, you will no longer worry about the dog's barking. Our Dog Barking Control Devices have been tested thousands of times with dogs of different sizes and breeds, and it can stop barking immediately or after 2 weeks of training. Anti Barking Device Specifications Power :USBInput current :40mAhBattery :3.7V 1500mAhWaterproof IP level :IPX4Sensor: Sound detectionSensor distance: up to 48 feetUltrasonic frequency :15KHZ-30KHZCharging: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”.ON-OFF:To turn device ON: Press the “POWER” button down for 3s 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 2-3s and it will beep twice and turn itself off.Package:1 * Anti Barking Device1 * charging cable2 * Mounting Screws and Anchors1 * User Manual Anti Barking Device Features1. Safe and effective for dogs of all sizes: Anti barking device equipment is safe and effective for dogs of all types and sizes (6-125 pounds).2. Wide effective range: 48-feet control range, Dog Barking Control Devices are great for deterring neighbor dogs or homeless dogs from barking near your house.3. Dog Barking Control Devices only need to be fully charged for 2 hours to standby time :1 month4. Dog Barking Control Devices 4 different frequency waves to avoid dogs getting used to simple frequencies.