A small digital micrometer. A multimeter is an electronic measuring instrument that combines several measurement functions in one unit Stock Photo - Alamy
How to use a Multimeter for beginners: Part 1 - Voltage measurement / Multimeter tutorial - YouTube
Wireless MultiMeter using PIC18F452 Microcontroller
Cen-Tech P30756 Digital Multimeter for Sale in Tacoma, WA - OfferUp