On the inner flap of the box, you'll find a web address / QR code, along with a 4-digit password. This takes you to an online questionnaire which covers a wide range of questions, such as where you purchased the console, how you heard about it and what other mini-consoles you currently own (thanks, gosokkyu).
The most interesting question relates to future mini-consoles from Sega. Asking "which classic Sega hardware replica would you like to see next?", Sega gives you the following options:
- SG-1000/1000 II
- Mark III/Master System
- MD Mini 3
- Game Gear Micro pt.2
- non-Micro Game Gear
- arcade (a la Astro City Mini)
- other (specify)
- not particularly interested
Interestingly, another question asks "if a remake or sequel to a classic Sega IP were to be released, would you buy it?", while other questions ask what you'd want from a 'revival' series.