2019-09 "AstroAI Digital Multimeter, TRMS 6000 Counts Multimeters Manual and Auto Ranging; Measures Voltage, Current, Resistance, Continuity, Capacitance, Frequency; Tests Diodes, Transistors, Temperature, Red" www.amazon.co.uk/dp/B071JL6LLL (archive). Manual: web.archive.org/web/20190904200759/https://static.astroai.com/manual/Astroai-Digital-Multimeter,-Trms-6000-Counts-User-Manual-en.pdf. www.youtube.com/watch?v=uDGCs1G0Tx8 AstroAI WH5000A Digital Multimeter some basic features