Auawak Bluedio N2 Bluetooth 4.1 Wireless Stereo headphones Earbuds Built in Mic for iPad iPhone Android and PC - Black Auawak Bluedio N2 10mm dynamic drivers, and CCAW voice coil from Japan, it created surprising full-bodied timbre, clear and bright, better transient response, restore true sound of your favourite singer. Leading new era by Bluetooth 4.1: Incorporate high speed 80MIPS Kalimba CPU and 80MHz RISC MCU Bluetooth 4.1 chipset of CSR from the UK, N2 is tough enough for stable high speed operation. Sample rate of N2 has dramatically expanded from 8kHz to 16kHz, speech frequencies expanded from 280Hz-4kHz to 50Hz-6.1kHz, far beyond band limits caused by mobile network and Bluetooth link, it means that narrow band era has come to an end, ultra HD wideband speech has come to your world. 6th generation CVC noise reduction: Significantly improves receive path voice signal by sophisticated algorithm technology and altering the spectral shape of the receive path signal, which AEQ estimate near-end noise, improves far-end voice frequencies; WNR remove unwanted noise during a hands free conversation, cleaning the audio for far-end listener. Tight and light for more comfortable wearing. Superior sound isolation by silicone eartips, ergonomically designed to provide comfort in your ear. N2 also effectively prevent sweat and rain to interfere with headset operation.