This compact pro multimeter and oscilloscope package is quite pricey but is really very good and displays results via Bluetooth on a smartphone app.

Data is stored and logged for up to six months even without a phone connection. Set up a multimeter in one place and choose readings in another, while the oscilloscope picks up circuit noise and current variation over time.

The ultra-compact Pokit meter has the same functionality for £81 although with a 60volt capacity down from 600volts without handling attachments.

The combined package costs £163 and more information is available via ENDS.