Bright, easy-to-read large LED display that is durable, compact and lightweight. Long-life internal rechargeable battery for uninterrupted monitoring. Includes three level alarms with alarm volume control . 72-hour Data Memory allows for on-screen data replay. Suitable for adult, Ppdiatric and neonate use. Optional internal thermal recorder. Product Features a performance measurement range: SpO2: 0%-100%, Pulse Rate: 30bpm~250bpm. SpO2 Accuracy: Adults, Pediatrics: 70%-100% ±2% 0%-69% unspecified, Neonates: 70%-100% ±3 0%-69% unspecified. Pulse Rate Accuracy Adults, Pediatrics, Neonates: ±3% ECG ECG cable: 5 Lead ECG Cable Lead selection:?,?, ?/ aVR, aVL, aVF/ V Gain (mm/mV): 1/4, 1/2,1, 2, 4, Manual/Automatic Sweep speed (mm c): 6.25, 12.5, 25, 50 Heart rate range: 30-300bpm Heart rate accuracy:±1bpm or ±1 % ST segment analysis (Diagnostic mode): a. ST range: -2.0mV-+2.0mV b. ST accuracy:±0.02mV Monitoring mode: Diagnostic 0.05-100Hz Monitoring 0.5-40 Hz Operating 1.0-25.