This is a DT266/DT268 model digital clamp meter.
It is a handheld electronic multimeter used for measuring voltage, current, and resistance.
It is designed for use by electricians, technicians, and hobbyists.
Key features often include an easy-to-read LCD display, data hold function, and audible continuity test.
It can measure AC current up to 600A and AC/DC voltage up to 600V.