... KH300AG intelligent mini color paperless temperature recorder, is high quality and poplar model ... . Features .8MB built in memory for long time memory .Photoelectrical isolated input: T.C., RTD ... time Record time=45days* record interval time/channels record interval time can set as 1,2,3...3600second flexibly in the recorder ... is 6, and the record interval time set in recorder is 60s, it can record 450days ...