TWICE VIP Award 2016 Winner! The DU Wireless includes AAC/AptX Ver. 4.0 wireless technology for superior high-definition wireless playback and easy NFC Bluetooth pairing for music enthusiasts who want to enjoy uncompromised sound while on the go. Cleer’s DU, Dual Driver Series Premium Headphones offer the latest AAC/AptX lossless high-quality codecs built-in optimize the Bluetooth audio streaming to transmit true high definition wireless audio playback and high-performance sound with its 40mm neodymium-drivers. Its built-in quick-charge rechargeable lithium battery delivers up to 20 hours of music playtime and includes an LED indicator for battery capacity. The DU’s modern and foldable design includes a logo and high-quality housing, which not only look good but are also extremely lightweight. The soft leather changeable ear pad and headband are made of an eco-friendly artificial protein that are designed to have the same look, feel and comfort of real leather.