Dairui Technology

Dairui Technology (戴乐科技) is a smart musical instrument company — the brand behind Aeroband's "air pick" — that combines consumer innovation with intelligent tech, using motion capture and digital audio synthesis to build products like motion-sensing drum kits and smart guitars, with the aim of lowering the barrier to learning music . Founder Yafeng Niu started the company in college with 150,000 yuan in startup competition prize money and spent a decade pushing smart instruments to a global market . FreeS Fund has been a consistent backer: it led a Pre-A round of over 10 million yuan in early 2024 and kept adding as Dairui closed a Series A of nearly 100 million yuan . In Niu's framing, the phone was the entrance to the mobile internet, and smart instruments combined with large models are "the entrance to our emotions" ; his current focus is a second-generation product with biweekly feature iterations . All coverage here comes from FreeS Fund's own publications, its lead investor.