The quality is reasonable and the item is easy to use. It meets my expectations and overall I’m pleased with it.
FiiO M21 Portable DAC
Product Details
The FiiO M21 is a portable DAC that supports Hi-Res Audio.
- Model Name: M21
- Brand: FiiO
- Feature: Hi-Res Audio Support
- Country of Origin: China
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Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.
Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.
Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.
Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.

