1MORE SonoFlow Active Noise Cancelling Headphones, Bluetooth Headphones with LDAC for Hi-Res Wireless Audio, 70H Playtime, Clear Calls, Preset EQ Via App, Black Wireless Audiophile Sound: certified by Hi-Res Audio and Hi-Res Audio Wireless, 1MORE SonoFlow features 40mm DLC dynamic driver to produce stunning sound and its frequency response can reach up to 40kHz. Lossless LDAC Audio Coding Technology: LDAC allows you to enjoy a high-resolution audio experience by transmitting at a transfer rate of 990kbps. Every subtle detail will come to life. Powerful Noise Cancellation: With QuietMax noise cancellation technology, whether working in the office, walking outdoors, or on the subway, you can get a restful private space for a truly focused, immersive listening experience. Nonstop Music Enjoyment: Just immerse yourselves in your favorite music without the anxiety of running out of power, even on a long trip. A single charge with ANC off can sustain up to 70 hours of battery life. Adjustable EQ Settings: Choose from 12 studio-grade EQ presets in the 1MORE MUSIC App to make your playlist even more enjoyable. Simply tap the calibrated Electronic, Pop, Classical, or Lounge equalizer setting! Enjoy Sound with 2 Devices: The SonoFlow over ear headphones can be connected with two devices simultaneously