FISHER XLT-30D Acoustical Liquid Leak Detector Version D: Acoustical Leak Detector Kit Includes Big Foot and Multi-Sensor Microphones... Kit also includes 1. Hydrophonic Cylinder Probe 2. Sound Rods 3. T-Handle 4. Headphones 5. Probe Cable 6. Carrying Strap/ Housing Mounting Bracket Specifications Operating Frequency : 60 Hz – 6 kHz, Gain = 95 db 20 Hz – 60 Hz, Gain > 90 dB Filter Types and Frequency Ranges : All Pass: 60 Hz to 6 kHz Low Pass : Adjustable cut-off frequency from 150 Hz to 2.4 kHz High Pass : Adjustable pass band frequency from 150 Hz to 2.4 kHz Band Pass : Adjustable center frequency from 150 Hz to 2.4 kHz Notch Filter : Adjustable center frequency rejection from 150 Hz to 2.4 kHz Can be used simultaneously with any filter option Output Indications Audio : High performance headphones ( 64 ohms) Visual : LCD bar graph and 2-digit numeric display Grade of Protection : Splash Proof Battery Test: Automatic Battery Quantity/ Type : 2 / 9V Alkaline Battery Life : 50 Hours ( approximately) Shipping Weight : 20 Power Supply : Two 9V Batteries Manufacturer : Fisher M-Scope MPN : XLT-30D Manufacturer Warranty : 2 Years