Feature: 1. Multi-function: Digital pulse oximeter can be used to measure pulse rate, blood oxygen saturation levels accurately. 2. Easy to Read: Support SPO2, pulse, and bar chart, you can view your result very clear with LED display. 3. Easy to Use: Accurate and reliable, one-button operation,just clip it on to your finger and turn it on at the press of a button. Automatically power off after 5s when not in use. 4. Wide Application: Suitable for everyday use. Widely used in family, physical care in sports, etc. 5. Compact Size: The oximeter is lightweight and portable. Specification: Features: Multi-function: Digital pulse oximeter can be used to measure pulse rate, blood oxygen saturation levels accurately. Easy to Read: Support SPO2, pulse, and bar chart, you can view your result very clear with LED display. Easy to Use: Accurate and reliable, one-button operation,just clip it on to your finger and turn it on at the press of a button. Automatically power off after 5s when not in use. Wide Application: Suitable for everyday use. Widely used in family, physical care in sports, etc. Compact Size: The oximeter is lightweight and portable. Specifications: Color: Black Material: Plastic Blood Oxygen Measurement Range: 0~100% Blood Oxygen Measurement Accuracy: 70 ~ 100%, ± 2%, less than 70% undefined Pulse Measurement Range: 30 ~ 250BPM (resolution is 1BPM) Automatic Shutdown: When no finger is inserted, it will automatically shut down within 5 seconds. Battery: 2 * AAA Batteries (Not Included) Package Size: 70 * 65 * 40mm/3.3 * 2.6 * 1.6inches Package Weight: 50g/1.3ounces Packing List: 1 x Oximeter 1 x User's Manual 1 x Lanyard Operation: 1. Insert 2 * AAA batteries and pay attention to the battery polarity indication. 2. Open the oximeter. 3. Place your finger in the oximeter. 4. Press the power button and wait for results. Package List: 1 x Oximeter 1 x User's Manual 1 x Lanyard Operation: 1. Insert 2 * AAA batteries and pay attention to the battery polarity indication. 2. Open the oximeter. 3. Place your finger in the oximeter. 4. Press the power button and wait for results.