VOXOA HD Wireless Stereo Headphones (White) Bluetooth 4.0, aptX, AAC, NFC, HD audio, Stereo One-touch bluetooth pairing for your NFC devices effortlessly. aptX for instant real time CD quality audio streaming. Support AAC audio format for Apple devices. HD voice or wide band audio will transmit more details in a persons voice during a call. On supported carriers or on Skype or other VOIP apps, your or your friends voices will sound richer and life-like over the phone. HD voice will also improve your experience when talking with voice recognition apps such as Siri (on iPhone/iPad/iPad mini) or Google voice search (on iOS devices and android phones). Designed for mobility with style, no cords to mess with. Experience ultimate audio freedom. Enjoy immersive sound with wireless freedom (the latest Bluetooth 4.0). Works with smartphones, tablets, music players, such as iPhone, iPad, iPod touch, android phones/tablets, Samsung Galaxy smartphones, Samsung Galaxy tablets, and many many other portable devices with bluetooth enabled. Hand-free calls with HD voice. It reproduces music cleanly and effectively, leaves no space between you and the music. Great detail reproduction means youll be able to hear background instruments and ambience and the headphones always sound clean and detailed. The highs are airy, the midrange is as smooth as silk, and the bass has exceptional extension and full-bodiedness, which leads to a warm overall sonic signature full of details. It does a great job at placing instruments in the correct spatial positions so it is easy to hear the multiple instruments across the soundstage.