The Etymotic Research hf5 In-ear Headphones gives high-quality, accurate audio. Balanced armature drivers and Etymotic's tuned acoustic-insert technology incorporated into a pair of compact, noise-isolating earbuds. Enjoy clear and accurate sound reproduction with iBasso DX50's 24Bit/192kHz output without the audible hiss of background noise, thanks to the industry-leading noise isolation technology of Etymotic Hf5 Earphones.With an assortment of eartips to choose from and its excellent degree of noise isolation, it allows you to immerse yourself in music comfortably. It is compatible with MP3 players, CD players, and more thanks to its 3.5mm plug. Carrying pouch included iBasso DX50 Main features: - Bit Perfect, Support up to 24Bit/192kHz - WM8740 24Bit DAC Chip - Built-in 9V Voltage Swing Headphone AMP - 2.4" IPS Screen(320*240) with Capacitive Touch Screen, Bonded by OCA - Up to 24Bit/192kHz Mini Coaxial Output - 3.5mm Headphone Output, and Line Out - Three Physical buttons (Rewind, Play/pauses, Forward) on The Top Panel. - 256-Steps Digital Volume Control - 8GB Onboard Flash - Support SDXC and SDHC MicroSD card, up to 2TB - 3-Setting Gain Switch - Audio Formats Supported: APE, FLAC, WAV, WMA, AAC, ALAC, AIFF, OGG, MP3, DSF