Product details:
Item specifics
Brand name : EaseAi                              Item Type: Handheld Pulse Oximeter
Material: ABS                                          Size: 145mm(L)*80mm(W)*35mm(D)
Application: Finger, Foot                         Commodity Quality Certification: CE
Model Number: DB15                             Power: 4 * AAA 1.5V alkaline battery or Recharge battery
Weight-approx: 480g                              SpO2 sensor: Adult, Child or Neonate sensor
Parameter: SPO2, PR                             Color: Red
Warranty time: 5 years    
Attention: the size and weight only refer to the size and weight of the product itself.  
Product Description:

Features
2.8 inch color TFT LCD display for SPO2&PR.Silicon rubber shell for easy protection.Compatible with Nellcor SPO2 Sensor.USB port support download test results to computer.Automatically switch off within 3 minutes when no signal.Adjust the parameters in friendly menu.Inner Flash memory can store testing result up 90 hours.Stable bracket for table usage.Visual and sound alarm function.Support 4*AA Alkaline battery and rechargeable Li battery.Low Battery voltage indicator.
Specifications
Display Mode: 2.8" Color LCD display display
SpO2
Measuring Range: 35%-100%
Accuracy: ±2% (80%~100%), ±3% (70%~80%), unspecified (<70%)
Pulse rate (PR)
Measurement range: 25-250 BPM
Accuracy: ±2BPM
Because of the aviation restrictions, batteries are not included in the package, please use   alkaline battery or Li battery to run it .  
Instructions for use
Select a suitable site for the sensor, for example the animal's ear. Alternative sites recommended are claw, hands or arms.Fit the sensor as illustrated on right. The animal's claw must inserted right to the end of the sensor. Direct the cable along the patient's claw and parallel to the arm. Affix with adhesive tape if required.Connect the sensor cable to the monitor or the patient cable and verify proper operation as described in the instrument's operator manual.