Light-weight pulse oximeters with high accuracy and reliable performances: - adjustable SpO2 and pulse alarm settings - quick assessment of oxygen saturation and pulse rate - with SpO2 and pulse rate display Pulse oximeter with printer and USB Built-in thermal printer allows immediate data printing. 36 hours memory (with interval of 6 seconds) or 24 hours (with interval of 4 seconds) with possibility to recall up to 100 records (print out the last records up to 240 seconds). Tone function and adjustable volume.