In that case, Pluto hands over a card with a symbol on it, something like a QR code. Mollymauk can scan this symbol with his tablet's camera to load up...

An audio file! The audio file plays a short melody, and can be played on loop.

If Mollymauk tries to probe Pluto for further instruction, she'll shrug and tell him that's the best he's gonna get before the tablets have GPS functionality.