A320 Fingertip pulse oximeter, based on digital technology, is intended for noninvasive spot-check measurement of SpO2 and pulse rate. The product is suitable for home, hospital (including clinical using in internist/surgery, anesthesia, pediatrics and etc.), oxygen bar, social medical organizations and physical care in sports.■ Lightweight and Easy-To-Use. ■ Color OLED display, simultaneous display for testing value and plethysmogram. ■ Adjust the parameters in friendly menu. ■ Big font mode is convenient for user reading the results. ■ Manually adjust the direction of interface. ■ Low Battery voltage indicator. ■ Visual alarm function. ■ Real-time spot-checks. ■ Automatically switch off when no signal. ■ Standard two AAA 1.5V Alkaline bаttеrу is available for power supply. ■ Advanced DSP algorithm inside minish the influence of motion artifact and improve accuracy of low perfusion.Always read and follow the instructions for use and health warnings. Consult your health professional to evaluate the readings. Refer to the instructions for a complete list of warnings. Long-term use or depending on the patient's condition may require periodic replacement of the sensor site. Change the sensor site at least every 2 hours and check for skin integrity, circulation status and proper alignment. SpO2 measurements may be adversely affected in high ambient light conditions. Shade the sensor area if necessary. The following conditions can interfere with the accuracy of pulse oximetry testing. 1. High frequency electrosurgical equipment. 2. 2. placing the sensor on a limb with a blood pressure cuff, arterial catheter, or intravascular line. 3. Patients with hypotension, severe vasoconstriction, severe anemia, or hypothermia. 4. Patients in cardiac arrest or shock. 5. Nail polish or false nails may cause inaccurate SpO2 readings. Please keep out of reach of children. Contains small parts that may pose a choking hazard if swallowed. This device should not be used on children under 1 year old as the results may be inaccurate. Do not use cell phones or other devices that emit electromagnetic fields near this device. This may result in improper operation of the device. Do not use the monitor in areas containing high frequency (HF) surgical equipment, magnetic resonance imaging (MRI) equipment, computed tomography (CT) scanners, or in flammable environments. Carefully follow the battery instructions.1. Two AAA 1.5v batteries can be operated continuously for 30 hours normally. 2. Hemoglobin saturation display: 35-100%. 3. Pulse rate Display: 30-250 BPM. 4. Power Consumption: Smaller than 30mA(Normal). 5. Resolution:     a. Hemoglobin Saturation (SpO2): 1%     b. Pulse repetition rate: 1BPM 6. Measurement Accuracy:     a. Hemoglobin Saturation(SpO2 ): (70%-100%): 2% unspecified(≤70%)     b. Pulse rate: 2BPM c. Measurement Performance in Low perfusion Condition: 0.2%