Pulse Oximeter Finger tip 
Portable Blood Oxygen Monitor Finger Pulse Oximeter Oxygen Saturation Monitor.
*Specifications:*
*Color:* white/black
Display mode: 0.96 inch two color OLED display (blue and yellow)
Display resolution: 128*64
Measurement range of blood oxygen saturation: 0%-100%(resolution 1%)
Accuracy: 70%-100%: +2%, lesss than 70%, undefined
Measurement range of pluse rate: 30-250bm(resolution of 2bpm)
Accuracy: +2bpm or +2% whichever is higher
Working Voltage: D-C 3.0V 
Package weight: 50g/1.8oz
Package size: 110*80*38mm/4.3*3.1*1.5in
Packing List:
1*Pulse Oximeter
1*Manual User