Don't let bad behavior break the bond between you and your dog; use a gentle, contact-free correction with the Collarless Trainer. The handheld device emits a high-pitched sound only your dog can hear, capturing their attention and allowing you to discourage unwanted behavior like barking, digging and jumping with the push of a button. The ultrasonic training tool has four working modes including tone, ultrasonic, ultrasonic with a flashing light, and flashlight. It also has two frequencies to reinforce training with different sound patterns. The rechargeable battery lasts for up to 15 days on a single two-hour charge. With a light, ergonomic design and a wrist strap for convenience, the Collarless Trainer is easy to carry on long walks or attach to a belt.