【Apt-X & AAC for Lossless Sound】Equipped with Apt-x Codec for Android and AAC Codec for Apple which driven by CSR 8645 Bluetooth chipset, NEUMA NE-18X headphones are born to produce superior HD high-fidelity stereo sound. Featuring 3 EQ modes double click the multifunction button to change in order to deliver the best experience. 【12Hours Enhanced Battery Life】Upgraded battery provides more than 12hours continuous playing time or 300hours standby time. Back to life in only 2hours of charging. Serves you all day long. 【Bluetooth V4.1 with CVC6.0 Noise Reduction】Pair with up to 2 Bluetooth devices in 33feet away at the same time. Vibration alerts from the neckband ensures you will never miss any call. CVC6.0 noise cancelling tech filters the outer noise and creates a pure environment with only clear sound. 【Ergonomic Fit】0.49 ounces net weight body makes you feel just nothing. Comes with 3pairs of different size ergonomically designed ear hooks and earbuds, non-slip neckband, magnetic attach earbuds the headphones ensure comfortable and secure wearing and using experience. IPX4 water resistant level. 【Built-in Mic & Button Control】Answering calls through the built-in HD mic without picking up your phone. With 3 multifunction buttons at your fingertips you can easily manage music, calls or your devices. Kindly read the user manual carefully before using.