TEST - Ultrasonic Speaker Test (Audible)The Ultrasonic Speaker on the right will transmit high-pitched sounds. This allows you to hear the sounds at an audible level to check if the Ultrasonic Speaker is working properly. | Switch 1 - ULTRA Mode (Inaudible)The Ultrasonic Speaker on the right will transmit varying high-frequency ultrasounds ranging from 18 - 65 kHz. | Switch 2 - DUO Mode (Inaudible)The Ultrasonic Speaker on the right will transmit varying high-frequency ultrasounds ranging from 18 - 65 kHz, and the Transducer will transmit intermittent impulse attack waves. | Switch 3 - TRIO Mode (Audible)The Ultrasonic Speaker on the right will transmit varying high-frequency ultrasounds ranging from 18 - 65 kHz, the Transducer will transmit intermittent impulse attack waves, and the Audio Speaker on the left will play the built-in audio recordings of rodents' predators. The volume of audio speaker can be turned up and down or turned off by adjusting the volume control knob. Maximum Sound Level > 100dB |