Indicates fhr/toco as numeral and outputs fetal heart sound. Recoding information like fhr, toco, fetal movement. Patented acoustic design enhanced vivid sound. High sensitive 2.5mhz/2.0 mhz pulse doppler transducer Automatic/manual fetal movement measurement. Rtc timer inside can display day/hour/minute. Built-in thermal printer with adjusted printing speed. 8 hours patients ctg data storage and reload ability. Event marker made 8 kind events. Built-in rechargeable battery for 12 hours (doppler mode)/4 hours(fetal Monitor mode) continuous wedical-use switch power supply guarantee 50, 000hrs working life. Rj45/usb connection interface optional. 280mm(l) íß 148mm(w) íß 200mm(h) Net weight: 1.9 kg Gross weight: 3.8kg Warranty:2 years(probe excluded)