This device can accurately determine your SpO2 (blood oxygen saturation levels), pulse rate and pulse strength in seconds and display it conveniently on a large digital LED display. It helps you to know your body conditions clearly. What is more, it is small in volume, light in weight and convenient in carrying. You can buy one, and take it anywhere to make sure you and your family members' bodies are OK.<br><br><strong>Features:</strong><br>Can measure SpO2 and pulse rate accurately.<br>SpO2 and pulse rate display, pulse rate waveform and bar graph display.<br>Battery voltage low indication, continuously work for 20 hours with two AAA batteries.<br>OLED display(two color), four directions and six modes.<br>Screen brightness is adjustable, makes the result much more clear.<br>In the absence of signals for 8 seconds, the product will be power-off automatically.<br>Small in volume, light in weight, and convenient to carry.<br>6 colors available: gray, coffee, blue, green, pink, purple, you can choose the one you like.<br><br><strong>Specifications:</strong><br>SpO2 Measurement Range: 70%-99%<br>SpO2 Measurement Accuracy: ±2% (80%-99%), ±3%(70-79%), unspecified (&lt;70%)<br>SpO2 Measurement Resolution: ±1%<br>Pulse Rate Measurement Range: 30-240 bpm<br>Pulse Rate Measurement Resolution: ±2bpm or ± 2%; low perfusion≤0.4%<br>Operating or Storage/Transportation Humidity:15-80%<br>Power Supply: 1.5V(2 AAA or alikaline batteries)<br>Power Consumption: below 30 mAh<br>Operation Temperature: 5-40℃<br>Storage Temperature: -10- 40℃<br>Color: gray, coffee, blue, green, pink, purple(optional)<br>Item size: 6 * 3.5 * 3.5cm / 2.36 * 1.38 * 1.38in<br>Item weight: 28g / 0.99oz<br>Package weight: 65g / 2.29oz<br>Package size: 10.3 * 6.5 * 4cm / 4.06 * 2.56 * 1.57in<br><br><strong>Package list: </strong><br>1 * Pulse Oximeter <br>1 * Lanyard <br>1 * User Manual