The micro iDSD Black Label is our top-rated desktop DAC and headphone amplifier. The sound of your music just got even better.Whether listening at home with your speakers or at work with your headphones, connect the micro iDSD Black Label to your computer and instantly hear the quality of your music be taken to the next level. FEATURES Adds warmth, depth, and smoothness to your favorites tunes. The micro iDSD Black Label is the world’s most powerful, battery-powered DAC and headphone amplifier, capable of unrivaled native playback in DSD, PCM, and DXD file formats. XBass+ cleans and restores the bass to give you a richer, deeper sound and 3D+ opens up your music to create a live-concert atmosphere. With 4,000mW, the micro iDSD Black Label can drive from the most sensitive IEMs up to the most power hungry headphones out there. Comes with 3 power output settings so that it can be adjusted to work with any earbuds or headphones. Battery life of up to 12 hours. 3.5mm rubber feet USB A Female > B Female Cable Caps for RCA sockets iFi bag USB3.0 A MALE > A FEMALE Silicone bracelet Label of battery charging RCA cable 6.35 > 3.5 adapter 3.5 male > male cable Optical Adapter USB A Female > B Female Adapter User manual Warranty Card STS card TECHNICAL SPECS Inputs/Outputs Inputs (rear):USB 2.0 type A “OTG” Socket (with iPurifier® technology built-in)Intelligent SPDIF® CoaxialSPDIF Optical Outputs (rear):Audio RCA L+RIntelligent SPDIF® Coaxial Output (right side):  SmartPower® Socket Controls Controls (front)– HP Output Audio 6.3mm Headphone Jack– Volume with Power On/Off switch Precision analog volume control– 3.5mm Input– X-Bass®:  On/Off– 3D Holographic Sound®:  On/Off Controls (left side)– Power Mode:  Turbo, Normal, Eco– Polarity:  Normal/Inverted– Filter:  3 positions, 6 filters Controls (bottom)– Line Direct/Preamplifier: Preamplifier function Enable/Disable, 0/9dB gain selectable– iEMatch®: Perfect-matching circuit for IEMs (eliminate hiss) DAC section DAC:Dual-core DSD, DXD, PCM DAC by Burr BrownBit-Perfect DSD processing, Bit-Perfect PCM processingClock:  Ultra low jitter GMT computer controlled Femto ClockAudio Formats:DSD 512/256/128/6424.6/22.6/12.4/11.2/6.2/5.6/3.1/2.8DXD 2x/1x768/705.6/384/352.8kHzPCM 768/705.6/384/352.8/192/176.4/96/88.2/48/44.1kHz Filters– PCM:  Bit-Perfect Processing/Minimum Phase/Standard– DSD:  Extreme/Extended/Standard Range– DXD:  Bit-Perfect Processing Specifications (DAC Section)Dynamic Range (Line):  >117db(A) THD & N (0dBFS Line):  2V Output Impedance (Zout):  < 240Ω Jitter (correlated):  Below AP2 test set limit Headphone Power OutputHP Amp Output - Power (max)– Turbo mode: 10.0V/4,000 mW @ 16 Ohm– Normal mode: 5.5V/1,900 mW @ 16 Ohm– Eco mode: 2.0V/500 mW @ 8 Ohm Specifications (Headamp Section) Dynamic Range (HP): >115dB(A) (Eco Mode, 2V Out) THD &N (HP 500mW/16R): < 0.008% Output Voltage (HP): >8V (Turbo Mode) Output Impedance (Zout):