Operation system: MS WINDOWS ME Transmit power: 5-700% adjustable PW depth: 25-120mm Cineloop: 60 seconds continuous, with position mark Frequency spectrum: FFT 256 dots Gain: Auto, Manual 1-15dB adjustable Spectrum display: 16 Bit color scale Interference filter: Auto multi-frequency filter Transducer frequency: 2MHz PW, 4MHz CW