比如蓝牙要FCC，儿童用品要CPC

1. MIDI keyboard / pad controllers for music games or rhythm-learning software. For buyers interested more in interactive music play than specifically guitar-shaped input, these are cheaper, more widely available, and easier to set up than a dedicated guitar controller.
2. Standard console gamepads used with rhythm games that support non-guitar input. For casual users who mainly want to access the game content rather than the guitar-playing experience, this is a more accessible substitute because they already own the controller.
3. Real entry-level electric guitars used with learning apps such as Yousician, Fender Play, or Rocksmith-compatible setups. For some users, a low-cost real guitar plus software is a stronger alternative than buying a game-specific guitar controller, because it builds actual guitar skill while still delivering gamified practice.
4. Rocksmith-style real-instrument cable setups or audio-interface-based guitar-to-game/PC learning systems. These can replace dedicated guitar controllers for users whose goal is skill development rather than arcade gameplay.
5. Mobile and PC rhythm games without instrument hardware. These are a strategic substitute because they deliver the same core entertainment loop—timed note matching and music engagement—at far lower cost and with zero extra hardware.
6. Used / legacy Guitar Hero or Rock Band controllers from resale marketplaces. For this category, secondhand hardware is one of the strongest alternatives because it is often materially cheaper than newly released third-party controllers and appeals to nostalgic buyers.
7. Keytar-style rhythm or MIDI controllers. For users attracted to performance aesthetics and music-game interaction rather than authentic guitar simulation, these can substitute the same use case with broader software compatibility.
8. Clip-on fretboard practice devices or silent guitar trainers paired with apps. For beginners who are motivated by learning hand positions and finger movement, these may substitute for a guitar controller more cheaply and with a smaller commitment than a full game accessory.

有替代品会影响你的风险