Features：BFM-700+ is fetal monitor with USB for twin. 5.7 inches TFT LCD displays US and UC data with monitoring trace curve; FHR collects signal indication, alarm indication for abnormal FHR, fetal movement indication, and can freeze monitoring status; Can set the time limit (0-99 minutes), automatically entering dormant state if no signal input; Store monitoring data for 24 hours, with replay function; Coding keyboard adjusts all parameters setting of the unit, convenient to use; Adopt 832 thermal linear array printer, store the data and print rapidly; and printing width is 112mm; The printer parameters can be adjusted according to user needs, including printing paper speed, trace line thickness, signal sampling rate, upper and lower alarming limit, real time, and date; Set-up data and parameters can be automatically saved after power off; The monitoring data can be conveyed to exterior computer through RS-232 or USB port; Trolly (adjustable) for option, convenient to move and operate. Specifications:1.  US：Transducer ：  9 crystals, wide wave beamWorking mode: Pulsed ultrasound DopplerUltrasonic frequency: 1.0MHz±10%Measuring range:    50-240 BPMAlarm range:  Up: 55-240 BPM  Adjustable continuously within range                       Low: 50-235 BPM  Adjustable continuously within range 2.  TOCO：Display range: 0-100units  (non-linear error: ≤±10%) 3.  PC PORT：Edition USB 1.1 or USB 2.0; RS-232 4. THERMAL RECORDER：Paper width : 112 ± 2mm ；effective record width : 105 ± 2mm;  Paper length : 15mRecorder density :  US:  27 BPM/ CM ;   UC:  40 BPM / CMPrinting speed (adjustable):  1 cm/min, 2 cm/min, 3 cm/min 5. POWER and BATTERY：Battery: 16.8V Ni-MH rechargeable batteries group;  AC 220 /110 V ;  Consume power: ≤ 50 WContinuous working time in static condition: ≥ 2 hours 6. ENVIROANMENT REQUIREMENT： Working Temperature: +5 ℃-40 ℃  Humidity: ≤80%  Atmospheric pressure: 86 kPa—106 kPa