Range and training effectiveness: Ultrasonic signals reach up to 30 meters, helping you train your dog to respond to commands such as sit, paw, lie down, and get up for complete obedience. Portable design and secure carry: Compact size with an included lanyard makes it easy to take the whistle anywhere. Special lock nuts and caps help ensure it stays with you whether you are outdoors or at home. Precise frequency control: Adjust frequencies for fast obedience training, observe your dog's reactions to each setting, maintain consistency in instructions, and continue training until mastery is achieved. Positive reinforcement and compatibility: Uses a positive behavior reinforcement approach to help your pet become a listening and obedient companion. Suitable for both dogs and cats, making it a versatile training tool. Use scenarios: Indoor daily training: Reinforce basic commands during routine activities and playtime. Outdoor walks and parks: Practice distance training and reinforce obedience up to 30 meters amid distractions. Multipet households: Train both dogs and cats with consistent instructions and reinforcement.