Medium Resonance Potion Development Materials Provides 3,000 Resonator EXP.

A potion that can further enhance the user's frequency perception ability. By adjusting the mixture ratio, this potion is more suitable for Resonators with relatively good control over their Fortes. With a near-perfect cost-effectiveness, it is regarded as flawless except for its "notoriously" bland taste.
Sources
Quests
Huanglong Exploration
Simulation Training
Gladiator's Portrait