1. Great Sound: Bluedio engineers have spent two years in creating T2 Ultra-big speaker, diameter up to 2.24 inches, trying to bring you the best music experience: rich and strong bass, crisp and clear highs., 2. Cool Look: T2, T is the abbr. for Turbine which we think can best stand for your endless passion and energy. And T2 is rotary, you can rotate the ear cup up to 195? easy to carry and save more space., 3. Bluetooth 4.1 Chip: It's the latest Bluetooth chip, which can transmit data at high speed and bring you smooth music experience. And its low power ensures long lasting battery life: up to 40 hours continuous music time. Also it works well with most mobile phones like iPhone/HTC/Motorola/LG/Samsung..., 4. Comfortable to wear: Its ear cup and headband top are padded with sufficient foam and covered with soft leather. What you may not notice is that we adjust the headband, based on Ergonomics theory, to fit all head sizes., 5. Bluetooth/Wired: T2 is not only a Bluetooth headset, but also a wired headset. With the included cable, you can still enjoy favorite music when the battery runs low.