SMSL Audio Idol Digital to Audio Converter 3.5mm headphone output and digital audio optical output Using the newest high end DAC chip PCM5122 from TI company Using asynchronous transmission chip TAS1020B from TI company High power output Low THD headphone amplifier Input Level 2.5 Vrms THDN 0.003% Dynamic Range108dB SN 105dB Headphone output power 100mW 100mW32ohm at THD 0.1% Output Jacks headphone output Optical output USB audio source specification 24bit44.1kHz96kHz USB transmission way asynchronous USB compatibility Windows Mac OS iOS Android 4.0 or above