ONKYO [ hi-res sound source corresponding ] Digital Audio Player (32GB) DP-X1 OS: Android OS 5.1.1 / Display: 4.7-inch (1280x720) capacitive touch screen / built-in memory: 32 GB (including system area) / external memory: microSD (SDXC) slot  2 / input-output terminal: 2.5mm 4 very balanced headphone output (R-R + / L + L from the tip -) / 3.5mm 3-pole headphone output (Line out mode corresponding) / Micro USB / OTG output (charging and data transfer combined use) Rated output: 75mW + 75mW, 32 (Unbalanced) / 150mW + 150mW, 32 (Balanced) (JEITA) / distortion rate: 0.006% or less / S / N ratio: 115dB or more / playback frequency band: 20Hz ~ 80,000Hz / Impedance: 16 ~ 300 / playback time of about 16 hours (96kHz / 24bit playback) Dimensions (H  W  D) mm: 130.0  75.9  12.7mm / weight 203g Accessories: Micro USB cable (1.0m)  for charging and data transfer Japanese product introduction site URL:http://www.jp.onkyo.com/audiovisual/headphone/dpx1/index.htm