The TA801 Series Digital Multimeters are compact, multifunction handheld measuring instruments designed for a wide range of electrical testing applications. The series includes four models: TA801A, TA801B, TA801C and TA801D. Designed in accordance with the EN61010-1 electrical safety standard and featuring a CAT III 600V safety rating, the series offers LCD displays with 2000-count-class (1999-count) and 9999-count configurations to meet different electrical measurement requirements. The series includes manual-ranging and intelligent automatic measurement versions. Standard functions include AC/DC voltage, AC/DC current, resistance, audible continuity, diode testing, NCV non-contact voltage detection and live/neutral wire identification. Selected models additionally support capacitance, frequency and duty cycle measurements, making them suitable for electrical troubleshooting and electronic component testing. Powered by two AAA batteries, the instruments feature an LCD backlight, LED flashlight, data hold, 15-minute automatic power-off and overload protection. The compact, ergonomic design allows convenient operation during routine inspections, on-site maintenance and electrical repair work. Also known as handheld multimeters, electrical multimeters, digital electrical testers, voltage and current meters, and circuit testing instruments, the TA801 Series is widely used in residential electrical installation, building construction, facility management, electrical distribution system inspection, appliance repair, industrial equipment maintenance, electromechanical servicing, electronics manufacturing, laboratory testing, vocational education and DIY electronics projects.