Identifies and pinpoints leaks generated by pressure, vacuum, water, gas or air. REED R9100 Offers This ultrasonic leak detector converts ultrasound signals produced by industrial machinery into easily recognizable audible sounds for a user to evaluate the condition of individual components. The R9100 includes a transmitter that generates a 40 kHz signal to help pinpoint leaks and headphones for use in loud environments. Features Locates leaks generated by pressure, vacuum, water, gas or air Visible (LED) and Audible (ticking) alarms assist in pinpointing leaks Earphone jack for loud environments (earphones included) User adjustable sensitivity wheel Ultrasonic Transmitter generates a 40 kHz signal Included Ultrasonic Leak Detector Transmitter Headphones Carrying Case Batteries