Response Time:＜5s Battery:2*AAA Operating Temperature:5℃-40℃ Storage Temperature:-10℃-50℃ Hemoglobin saturation:Upper limit:100, Bottom limit:94 Pulse rate limit:Upper limit:130, Bottom limit:50 Hemoglobin saturation display:35-100% Pulse rate display:25-250 BPM 1. Test items: SpO2%, pulse rate 2. Automatic shutdown when not working 3. Automatic shutdown on low battery 4. Battery symbol blinks on low battery 5. Press the key to turn on CE/FDA