Electronics > Wearable Technology > Smartwatches
ZT04 Ultra 3 49mm Smartwatch with 4 Bands KA-9960A
Brand: Generic / OEM
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Audited BOM: 16 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 heart rate sensor (COMP-003) experiences calibration failures (ENG-001) after updates, leading to RMAs (RMA-001) and user complaints (REV-001).
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