CEntrance HiFi-Skyn Portable DAC/Amp for iPhone 6+ / 6S+, Cool Black For iPhone 6+ / 6S+, Cool Black HiFi Sound for Your iPhone. HiFi-Skyn is an iPhone accessory with a simple mission: 1) Awesomify your music with legendary CEntrance audio quality. 2) Cradle your iPhone in a stylish, protective case. 3) Extend the phone's battery via built-in power HiFi-Skyn converts your phone into an awesome personal music player. It feaures super-clean audio output, lowest distortion, and an extra long-life battery. This innovative product not only extends the life of your phone, but also dramatically improves sound quality by using award-winning digital audio technology from CEntrance. Using a lightning jack connection, HiFi-Skyn takes high-definition digital audio straight from the iPhone, bypassing the phone's internal audio circuitry. It then uses a built-in, audiophile-grade D/A converer (DAC) coupled with a precisely-nuanced balanced headphone amplifier, to deliver unmatched sonic fidelity straight to your headphones. Made from tough polycarbonate plastic, the Skyn protects the phone while giving it extra charge and a significanty upgraded listening experience. Exclusive CEntrance technology guarantees bit-perfect audio reproduction up to 192kHz and DSD. Prepare to be impressed. HiFi-Skyn will breathe new life into your music collection!