Product details:
Item specifics
Brand name : EaseAi                                 

Item Type: Finger Pulse Oximeter
Material: ABS                                                    

Size: 63mm(L)*36mm(W)*35mm(D)
Application: Finger                                           

Commodity Quality Certification: CE
Model Number: DB12                                       

Power: 2 x AAA 1.5V alkaline battery
Display Modes: 4 directions                           

Color: Gray, Blue, Pink, Black
Parameter: SPO2 PR PI                                 

Weight-approx: 70g
Warranty time: 5 years     
Attention: the size and weight only refer to the size and weight of the product itself. 
Product Description:
Because of the aviation restrictions, batteries are not included in the package, please use   alkaline battery to run it .  
Brief Device Description:
The Oximeter can be used to measure human Hemoglobin Saturation and pulse through finger. The product is suitable for family, hospital (including clinical use in internist/ surgery, pediatrics, etc), Oxygen Bar, social medical organizations, physical care in sports and etc.
It is not for intensive care or person whose finger is injured.
Product Features
Lightweight for carrying and Easy-To-Use.Manually adjust the direction of interface.OLED display, simultaneous display for testing value and plethysmogram.Real-time spot-checks.Low Battery voltage indicator.Automatically standby or sleep.Data storing and data analysis function.Three parameter: SPO2, PR, PI
Specifications

Display Mode: OLED display
SpO2
Measuring Range: 35%-100%
Resolution: ±1%
Accuracy: ±2% (80%-100%), ±3% (70%-80%), unspecified (<70%)
Pulse rate (PR)
Measurement range: 30~250 BPM
Resolution: ±1%
Accuracy: ±2BPM
Power: 1.5V (AAA size), alkaline battery x 2
 Working current: < 30mA
Perfusion Index Display: 0-30%
Accuracy: ±1% (0-20%), unspecified (20%-30%)
Automatic power-off: Automatically power off when no signal in the oximeter for more than 8 seconds
Package Content
- 1 x Finger Pulse Oximeter
- 1 x Lanyard
- 1 x English user manual
- 1 x Carrying case
Operation
install battery
Installing two AAA batteries into battery cassette in correct polarities and put cover back on.
start the Pulse Oximeter
Put one of fingers into rubber hole of  the oximeter (it is best to put the finger thoroughly) with nail surface upward, then releasing the clamp.
Press the key, oximeter will automatic standby or go asleep after 8 seconds without finger in it.
Attention: This product is only suitable for those over ten years old.