GT9000B Multi-Parameter Monitor (Standards of IEC60601 and GB9706) Operating: Temperature 5~40 C Humidity = 80% Storage: Temperature -20~55 C Humidity = 93% Battery: Built-in rechargeable battery, maximum utility time = 2 hours Trend Observation: 1~72 hours trend graphics Network: Compatible with central monitoring system, Recorder: Built-in, thermal Recording Modes: Manual, alarm and timing Standard Configuration: ECG + RESP + NIBP + SpO2 + HR(PR) + Dual TEMP + Built-in Battery Optional Equipment: Built-in Thermal Printer producing area:China