| Fills | Shield |
| Heals | +2 rising to +16 a second |
| Full rate after | 8 s of playing |
| Heals who | 2 nearest squadmates |
| Heals you | No |
| Reach | 12 m |
| Stopped by a hit | Yes, and starts over |
| Carry | 1 per slot |
| Uses | Unlimited |
The Harmonica is a support item in Population: One. While it is played, it restores shield to the two nearest squadmates, up to 16 shield a second.
What the Harmonica does in Population: One
The Harmonica heals the 2 nearest squadmates within 12 m, never the player playing it: 2 shield a second to start, climbing to 16 a second after 8 s of playing, each of them the full amount. It is never used up.
A hit on the player, or lowering it, stops the music and the climb starts over.
Holding it makes the player 25% faster on their feet.
It takes one backpack slot.
Playing the Harmonica
It does not heal the player playing it, and it never runs out. The healing starts low and climbs each second; a hit on the player or lowering the Harmonica starts the climb over. Holding it makes the player faster on their feet.
Harmonica or Shield Soda and Shield shaker
The Shield Soda: 50 shield over 10 s. The Shield shaker: 50 shield at once.