MadgeTech RTDTemp101A RTD Based Temperature Data Logger with 10 Year Battery 10 Year battery life, 0.05 degree C (0.09 degree F) accuracy Multiple start/stop function, ultra high speed download, 670,000 Reading storage capacity, memory wrap, N.I.S.T. Traceable, precision RTD sensing element, battery life indicator Optional password protection, programmable high and low alarms, field upgradeable Not Included Required Accessory: IFC200 (includes software)