Electronics > Audio > Headphones & Earbuds > True Wireless Earbuds
M90 PRO TWS Bluetooth Earbuds w/ Digital Display, 33ft Range
Brand: Generic / OEM
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Audited BOM: 10 Components
RMA Chain & Defect Intelligence
Root cause causal graph linking factory engineering flaws to verified consumer return reasons.
⚡ Causal Link: Defect to Consumer Return
The low-quality Bluetooth chip (COMP-001) is the root cause of connection instability, leading to audio glitches and disconnections (ENG-001), resulting in RMA (RMA-003) and negative consumer reviews (REV-001, REV-006).
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