Hướng dẫn sử dụng tai nghe MicroPro ETYMOTIC ER-4
User Manual INTRODUCTION ER·4 MicroPro earphones, the first noise-isolating high-fidelity in-ear earphones, used high performance, balanced armature drivers. These high-definition transducers combine flat frequency response with passive noise isolation. Noise reduction with ER·4 earphones occurs naturally when the eartips are…