Designed for efficiency and affordability, The Fisher S XLT-30 leak detector incorporates advanced electronic amplification to deliver reliable results equipped with a and a, Tactile keypad a clear, Notch option digital screen for independently managing external noise Time the xlt, And again, 30 showcases its effectiveness against unwanted noise. Specs include an operating frequency range of 60 Hz to 6 kHz and a gain of 95 Featuring a gain greater than 90 dB, This product supports filter types and frequency ranges that transmit from 60 Hz to 6 kHz, Including 20 Hz to 60 Hz Set the low pass cutoff frequency between 150 Hz and 2. 4 kHz, And configure the high pass filter pass band starting at 150 Hz Features a bandpass with an adjustable center frequency that spans from 150 Hz to 2. 4 kHz, Complemented by a notch filter with a flexible center frequency Filters out signals between 150 Hz and 2. 4 kHz; can operate in conjunction with any filtering option; equipped with output alerts; superior audio performance audio performance headphones rated at 64 ohms # equipped with a visual LCD bar graph and a two-digit display # splashproof protection rating # battery testing capability automated# number/type of batteries 2 / 9v alkaline# estimated lifespan is roughly 50 hours xlt, 30 option, D big foot & multi, Sensor microphones core items # durable carrying case # probe cable kit # instruction manual # control device # earphones # multi-sensor # shoulder strap # housing mount # sounds rods# big foot# weight 19. 5 lbs. 8. 8 kg