A similar amp function can provide better sound quality. Headphone output power:0 - 250 mw. [Gold-plated input and output] Gold-plated interface to reduce signal transmission loss. Gold Plated Input : 1 x Toslink(Inculded 1m 4.0/OD Toslink Cable), 1 x (Coaxial); Gold Plated Output : 2 x (R/L), 1 x 3.5mm Jack; by 5.5mm USB power cable (power adapter not included); don't use other plugs, does it only use 5 v 1 plug.
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