The OM-CP-RTDTEMP2000 features a 9-volt battery, a backlit LCD and a 8-button keypad with lock feature. The recorder’s optional ac adapter is available for continues use with the display and backlight on. In additional the recorder features NIST traceable calibration for users that must meet regulatory requirements. The designed uses include applications requiring precise temperature readings especially in chemical, water and food industries. OMEGA Engineering, Inc.