Is this a real synthesizer?

No. It is a ceramic mug with artwork inspired by the Roland Juno. It makes no sound and has no controls.

Synth players, producers and Juno fans. It works as a desk mug or a gift for a musician.

Is it dishwasher safe?

That is not stated. Hand washing is the safer choice to protect the printed design.

No size options are listed. Treat it as one standard mug.

It is described as Juno-inspired, not as official Roland merchandise.

At Etsy, for $16.99, as of our latest check.

$16.99at EtsyChecked Nov 11

Prices are checked against each store and labelled with when.

It checks today's price at every store, compares the alternatives and answers in about a minute.