What is the difference between handheld ultrasonic repellers and collar-based options?
Handheld devices give you on-demand control for walks or specific moments since you press a button to send the sound. Collar-based tools are geared toward ongoing training or bark control and can give a consistent cue without you having to aim a separate device. Choose the style that best matches how and where you plan to use it.
How important is range for everyday use with ultrasonic dog repellers?
For close training or leash work, a shorter range is usually enough to interrupt behavior. If you want to be out in open areas, a longer range can create a bigger buffer. Keep in mind that reach and consistency matter, and real-world response varies by dog.