Dual AK4490EN DAC chips for the ultimate in decoding performance, supporting up to 384kHz/32bit and native DSD 256; Apple MFi, Hi-Res Audio and aptX certified, supporting decoding for iPhones, iPads, computers Interchangeable amp modules, fully compatible with any FiiO amp modules; Unique RGB status lights with different colors to help quickly identify the input modes and working status.Dual AK4490EN DAC chips for the ultimate in decoding performance. XMOS USB Audio to ensure a rock-solid connection. Certified by 3 Major Bodies (Hi-Res Audio, MFi and aptX) Interchangeable amp modules, fully compatible with FiiO's lineup. Balanced and single-ended outputs all in the AM3A. Audiophile-grade components (OPA1642 + MSP432 + Panasonic film capacitors + NJW1195)State-of-the-art ADC volume control, 3800 mAh battery for longer listening, Powerful functionality (High performance USB DAC for computers, iPhones, WM-port players; world-class Bluetooth audio and one-stop shop for all of your coaxial/optical/line input needs).