This is a Fluke 15B MAX Digital Multimeter, a rugged tool designed for electrical troubleshooting.
It features a large, backlit display and measures AC/DC voltage up to 1000V and current up to 10A.
The meter includes functions for resistance, continuity, diode testing, and capacitance.
It has a 600V CAT III safety rating, making it suitable for residential and light-industrial environments.