Features 12.1â Large-screen Color TFT Display User-friendly Design and Easy Operation Mode Optional AC/DC Power Supply, Uninterrupted Monitoring Built-in High-capacity Battery, Up to 5 Hours Working Time Adjustable Colors for Parameter Data and Curve Maximum 96 Hours Storing and Replaying of Trend Graphic Data Maximum 90 Minutes Capturing and Replaying of ECG Waveforms Individual Digital Module Structure, Convenient for Maintenance and Upgrade Protection Against Interference from Defibrillation and High-frequency Electrotome Digital SpO2 Technique, Precise Measurement for Low Perfusion and Finger Shaking Intelligent Voice/Light Alarms Accurately Transmit Diseases Compatible with Central Monitoring and Far-distance Monitoring