UEi Test Instruments designed the DL389 for professionals; in this kit it's combined with a pipe-clamp probe for easy temperature measurement. The DL389 adds TRMS measurement to the DL389 and is packed with features for the real-world: backlight, work light, magnet for hands-free operation, test lead holder, detachable clamp head, safety input jack lock and CATIII safety rating. UEi Test Instruments has over 45 years experience designing and manufacturing a broad range of award-winning, industry-leading Test and Measurement Tools. UEi Test Instruments are sold throughout North America and Canada and professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. UEi' s NIST-certification laboratory is compliant with ISO17025. UEi backs its products with dedicated technical support, service and repair teams.