MD-670P Portable Pulse Oximeter is a non-invasive measuring instrument for SpO2 and Pulse Rate. Except the display of Real time SpO2 and Pulse Rate Values, MD-670 can also display the waveform of these 2 values on LCD screen, it is very convenient for users to distinguish the quality of detected signals. It also features 72 hours memory and Trend function, users can download data to PC through USB port and the application of Smart Link I Software, in order to review and analyze the data. Display: Oxygen Saturation, Pulse Rate, SpO2 Waveform SpO2 Range : 0% ~ 100% SpO2 Accuracy : 80% ~ 100 ± 2 % 65% ~ 79 ± 3 % Pulse Rate Range: 30 bpm~250 bpm Pulse Accuracy: 30% ~ 25bpm ± 1 % Sound: Volume and Mute selectable Memory Trend: 72 hours/8 secs & 36 hours/4 secs. Interface Output: USB port Operating Temp: 0?~ 55? Power requirement: 6 volts by 4 pcs AA size batteries or AC/DC adapter Dimensions: 170 x 88 x 44 mm Weight: 250 g(without batteries) Quality System: ISO 9001, ISO 13485, GMP Safety: 0434