Bluedio S3 Bluetooth 4.1 sports headset for Mobile Phones - Retail Packaging - Black 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, S3 is tough enough for stable high speed operation. Reproduced true sound: Crafted with 14.2mm dynamic drivers, and CCAW voice coil from Japan, it created surprising full-bodied timbre, clear and bright, restore true sound of your favorite singer. T-Light2 earbuds: Tight and light for more comfortable wearing. Superior sound isolation by silicone eartips, ergonomically designed to provide comfort in your ear. S3 also effectively prevent sweat and rain to interfere with headset operation. Ultra HD voice: Sample rate of S3 has dramatically expanded from 8kHz to 16kHz, speech frequencies expanded from 280Hz-4kHz to 50Hz-6.1kHz, 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.