4 Inch Multi Channel Temperature Recorder 4 Channel 2 Alarm Digital Paperless Temperature Meter Item Type: Paperless Recorder Material: ABS Power: 10W Display: 4 Inch Color LCD Resolution: 800 x 480 Resolution Measurement Channel: 4 Channel Universal Analog Input Measurement Accuracy: 0.2%F.S Sampling Period: 1s ESD Anti Static Discharge: Contact Discharge 4000V, Air Discharge 8000V Withstanding Voltage: Between Measurement Input Terminals: 400V, Between Protective Ground and Measurement Terminals: 1000V Warm Up: 30 Minutes After Power On Operating Temperature: -10-60°C Operating Humidity: 0-85%RH ( No Condensation ) Recording Interval: 1s, 2s, 5s, 10s, 15s, 30s, 1 Min, 2 Min, 5 Min, 10 Min, 30 Min, 1 Hour Data Memory: 128 Mb, 900,000 Records, 10 Days for 1 Second Recording Interval, 10 Days for other Recording Intervals, and so on. The corresponding record length for other record intervals is similar, and the record length has nothing to do with the number of channels. Other Records: 256 Alarm Records, 256 Power Off Records, 256 Operating Logs Printing: 1 Channel, Micro Printer, 3.3V TTL Level Interface USB: USB 2.0, Support Large Capacity U Disk ( Shipped Without U Disk )