【Function】 It can monitor and display the FHR,UA, TIME with LED and 7 blue backlight LCD(Only for single fetus), and can freeze and print the record with a thermo sensitive printer. 【Technology】 Transducer: multi-crystal, pulsed Doppler Frequency: 1 MHz Intensity: ≤10 mW/C㎡ Power: 220V AC, 50/60 Hz, <40W RH: 10~80% FHR range: high: 160, 170, 180, 190bpm Low: 100,110,120bpm Toco measurement range: 0-100units