for carrying and Easy-To-Use. Using DB9 type connector compatible with for DS100A Spo2 Sensor. ( please pay attension to that for Oximax sensor can not be used on the device) Support the oximeter probe for adult, neonate and infant. Big size 2.8 inch color TFT LCD display for SPO2/PR/Pulse bargraph/ plethysmogram. Visual and sound prompt function. Adjust the parameters in friendly menu. Low Battery voltage indicator. Automatically switch off within 3 minutes when no signal. 8 languages Display Mode:2.8inch Color LCD display SpO2 Measuring Range: 35%~100%, (the resolution is 1%). Accuracy:80%~100%:+/-2% ,70%~80%:+/-3% Below 70% unspecified. PR Measuring Range:25bpm~250bpm, (the resolution is 1bpm) Accuracy:+/-2bpm Color: As Shown Material: ABS Package Contents: 1 x H381 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.