Q1MKII is a portable headphone amp and digital-to-analogue converter (DAC) and is Apple MFi certified. Ever since Apple removed the 3.5mm headphone port from the iPhone, a digital amp and DAC offers a good alternative to Bluetooth. The Q1MKII is perfect for audiophile iPhone users. The supporting decoding rate of Q1MKII goes up to 384 kHz/32bit, which also supports decoding Direct Stream Digital (DSD) music. It comes with a 3.5mm standard headphone port, which can meet your daily use, while the 2.5mm balanced port can greatly enhance the drive ability.