Introducing the Extech EX840-NISTL, the ultimate precision multimeter with a Limited NIST Certificate. Unlike ordinary multimeters, the EX840-NISTL offers unparalleled accuracy and reliability, backed by the rigorous standards of the National Institute of Standards and Technology (NIST). Its advanced features, including True RMS measurements, wide measurement ranges, and a large backlit display, empower you with the confidence to tackle even the most demanding electrical tasks.