The PESTON Ultrasonic Anti-Bark Device is a reliable and effective way to deter dogs from barking. With a control range of 16.4 feet, this device is perfect for keeping pets away from sensitive areas or rooms in your home. The device comes with an adjustable wrist strap and electronic dog repellant features that are rechargeable with lithium batteries. Simply press and hold the button to emit ultrasonic sound, and the device will attract the dog’s attention.