FiiO X1 Silver High Resolution Audio Music Player w Silicone Case PLUS Etymotic HF5 Noise-Isolating In-Ear Headphones (Cobalt) - HIGH PERFORMANCE BUNDLE &hellip; The FiiO X1 High Resolution Lossless Music Player supports APE, FLAC, WAV, WMA, ALAC at up to 192kHz/24bits. Also supports MP3 Dedicated professional high-quality amplifier-The X1 also employs Intersil's newest ISL28291 amplifier buffer Documented highest noise isolation of any earphones or headphones on the market today. 35 dB - 42 dB noise isolation AccuDriver(TM) high performance, precision matched, balanced armature drivers. ACCUFilter(TM) User-replaceable filters that protect the balanced armature drivers. Kevlar-reinforced cable for durability Includes an assortment of noise-isolating ACCUFit eartip options to ensure proper seal and comfort