The XLT-30 leak detector from Fisher is engineered for optimal performance utilizing cutting-edge, And affordability electronic amplification for enhanced detection including a tactile keypad, An easy-to-read digital interface, And a notch capability that permits distinct suppression of external elements interfering noise the xlt, 30 proves its worth again and again. Specifications# operating frequency # 60 hz 6 khz, Gain = 95 With a gain level above 90 dB, This device accommodates filter types and frequency ranges that facilitate 60 Hz to 6 kHz, Spanning from 20 Hz to 60 Hz 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 serve multiple purposes simultaneously with any filter option# output indications # audio high premium headphones boasting 64 ohms of performance # is equipped with a visual LCD bar graph and a 2-digit numeric indicator # engineered to serve as splash resistant # includes a battery test feature automatic# battery details 2 / 9v alkaline# approximate operational life is 50 hours standard equipment # heavy, Duty carrying case# hydrophonic cylinder probe# probe cable assembly# operation manual# control unit# h ead phones# big foot# carry strap# housing bracket# sonic bars# heft 19 lbs. 8. 6 kg