The FiiO KA2 is a compact DAC and headphone amplifier that instantly enhances the sound quality and volume of your iPhone. The KA2 connects between your headphones and iPhone, allowing you to hear your music with more detail and richness. It comes with a seven-centimeter long Lightning cable that is compatible with iPhone and iPad. A Lightning to USB-A adapter is included, enabling the KA2 to be used with Windows and Mac computers as well. You can connect a compatible headphone to the symmetrical 4.4 mm jack of the FiiO KA2. The two powerful CS43131 DAC chips convert the signal losslessly from digital to analog. It supports audio files up to 384 kHz and 32-bit, as well as DSD256. The aluminum housing of the KA2 features an RGB indicator to show the sample rate of the currently playing track. Whether at home or on the go, whether listening to music, watching videos, or gaming, the KA2 reliably improves the sound quality from your iPhone, iPad, or computer.