New digital technology from BCI. Instead of relying on a voltage threshold to determine a pulse, BCI's latest technology analyzes a digitized signal at a rate of 120 times per second (serial autocorrelation) and compares it to previous pulse data. Adaptable to clinical, home and sleep environments. Internal rechargeable battery and plug-in power. Real time or trend printouts available when used with computer or printer. Measures SpO2, pulse rate and pulse strength. Available with LOUD alarm. Includes monitor, adult reusable sensor, manuals. Two year warranty.