1、Made of high-quality plastic, durable, corrosion-resistant, not easy to damage 2、With a special data display screen, it can clearly and accurately display the human body's blood oxygen index 3、Small size, light weight, easy to carry 4、The method is simple, no complicated steps are needed, and the measurement speed is fast and accurate 5、It can be used to measure oxygen saturation, pulse rate, respiratory rate and so on Features: Made of high-quality plastic, durable, corrosion-resistant, not easy to damage. With a special data display screen, it can clearly and accurately display the human body's blood oxygen index. Small size, light weight, easy to carry. The method is simple, no complicated steps are needed, and the measurement speed is fast and accurate. It can be used to measure oxygen saturation, pulse rate, respiratory rate and so on. Specifications: Condition: 100% Brand New Material: Plastic Anti-electric Shock Type: Internally powered equipment Anti-electric Shock Degree: Type BF equipment EMC: Group 1 Class B Mode of operation: Continuous Operation Enclosure Degree of ingress protection: IP22 Battery: 2 * AAA 1.5V alkaline battery (Battery not included) Power Consumption: 30mA(Normal) Operating Temperature: 5℃ to 40℃ Storage Temperature: -20℃ to 55℃ Relative Humidity: 15% to 85%, non-condensing SpO2(Oxygen saturation): 35-100% PR (Pulse Rate): 25-250 bpm RR (Respiration Rate): 10-70 rpm SpO2 (Oxygen saturation): 1% PR (Pulse Rate): 1 bpm PI (Perfusion Index): 0.1% (<10%), 1% (10% - 20%) RR (Respiration Rate): 1 rpm SpO2(Oxygen saturation): 2% (80% - 100%), 3% (70% - 80%), Unspecified (<70%) PR (Pulse Rate): 2 bpm PI (Perfusion Index): 1% RR (Respiration Rate): 2 rpm Weight: Approx. 38g / 1.3oz Size: Approx. 57*31*30.5mm / 2.2*1.2*1.2in Package list: 1 * Oximeter (Battery not included) 1 * Instruction Manual 1 * Hand Rope Problems in use: Oxyhemoglobin or heart rate cannot be displayed normally. 1. The finger is not inserted correctly. 2. The user's perfusion is too low to measure. or 1. Try again by inserting your finger. 2. Try more than once. If you can confirm that there are no problems in the product, please go to the hospital for diagnosis. Oxyhemoglobin or heart rate shows instability. 1. The fingers may not be inserted deep enough. 2. The finger is shaking or the user's body is in motion or 1. Try again by inserting your finger. 2. Try not to move, let the user stay calm. The oximeter cannot enter the working state. 1. The battery may be low or not at all. 2. The battery may not be installed properly. The oximeter may be damaged. 1. Please replace the battery. 2. Please reinstall the battery. 3. Please contact your local customer service center. The screen suddenly turns off. 1. When the signal is detected for more than 8 seconds, the product automatically stands by or sleeps. 2. The battery is exhausted. 2. Replace the battery. Note: To avoid contamination or infection of personnel, the environment, or other equipment, be sure to properly disinfect or clean the equipment before disposing of electrical and electronic components in accordance with the laws of your country.