Description
【Adjustable Frequency Technology & 2 In 1 】- POIIOPY dog training device can emit the high-pitched ultrasonic sound of different frequencies, which can avoid becoming immune to a certain frequency ultrasonic sound after a long time of adaptation and no longer respond to it, so you can use different sound waves alternately in each period of time. Use the BEEP MODE before each use of ultrasound mode, so that some dogs can be conditioned to reflect, and they will react after hearing the BEEP sound.
