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. Low Power Consumption: In the absence of signals, the product would power-off automatically after 8 seconds. Widely Applicable: Suitable for everyday use. Widely used in family, oxygen bar, physical care in sports, etc. Compact Size: The oximeter is lightweight and portable. Specifications: Model: SMH-01 Color: black Material：ABS Display type: LED Blood oxygen measurement range: 5%-99% Blood oxygen measurement accuracy: 70-99% Pluse measurement range: 30-250BPM Power consumption: below 30mA Operating temperature: 5℃-40℃ Humidity: 15%-80% Atmospheric pressure: 70kPa-106kPa Battery: 2 * AAA 1.5V alkaline batteries(Not included) Package size: 7.5 * 5.2 * 3.5cm Package weight: 34.2g Package List: 1 * Fingertip Pulse Oximeter 1 * Lanyard 1 * User Manual