The Receiver Performance: Allsun pro ultrasonic leak is mechanics electronic stethoscope, the receiver is sensitive to ultrasonic in the frequency range of 36k to 44kHz Audio feedback and a 10 bar LED indicator for visual intensity of signal, 33mm directional receiver port, 3.5mm stereo jack and a rotary on/off volume control switch.

Accurate & Reliable: Pro Ultrasonic Leakage Detector Kit,the 30cm air probe serves to extend reach or to facilitate isolating a leak among multiple suspect areas.This Ultrasonic Diagnostic Tool is easy to carry and operate, and its detection result is accurate and reliable.

Tone Generator Performance: Advanced Refrigerant Leakage Detector,the Tone Generator emits a warble output centered at 40kHz for use in testing seal integrity in non-pressurized vessels.The human ear cannot hear this output, so the Tone Generator must be used in conjunction with the Receiver.