Features:
Test the hemoglobin saturation & the pulse rate
2directions adjustable
Display: LED
Low battery indicator
Auto switch off
Infrared measurement method
Color: blue, green,pink ,Silver,black
Specifications:
battery:3V;2AAA 
power consumption:Smaller than 30mA
Operating temperature:5°C~40°C
SpO2 Measuring Range 35%~100% (the resolution is 1%)
Accuracy :±2bpm or ±2%;
Display: OLED display
Pulse rate display:30~250BPM
outer box:65mm*45mm*95mm
net wight:31.4g
gross wight:56.8g
dimension:60mm*35mm*37mm
EMC:type B class 1