T2, Turbine 2, releases globally in Nov. 2014, a upgraded version of H-Turbine. It"s been 6 months, our engineers redesign Turbine idea, trying to bring the best music experience for you. Besides the amazing bass as H-Turbine, T2 is foldable and easy to carry, more comfortable to wear, more metallic in look, and strengthened in headband. Color: black, white Specifications: Bluetooth version: V4.1 Profiles: A2DP, AVRCP, HSP, HFP Drive: 2×Φ2.24inches Impedance: 16Ω Frequency response: 20 Hz -20KHz Sensitivity: 110dB THD: <0.1％ Operating distance: up to 32 ft (free space) Bluetooth music time: about 40 hours Bluetooth talk time: about 45 hours Standby time: about 1625 hours Fully charged time: about 2 hours Headset size: 7.87" tall 7.32" wide Package size: 7.87"×6.69"×3.35" Headset weight : 7.9oz Package weight: 15.49oz In the box: Bluedio T2 headset 1pc Charging cable 1pc Φ3.5mm Audio cable 1pc User manual 1pc Tips: Pair with the headphones: 1. When the headset is off(if not, power off the headset first), press and hold the MF button, only when the LED remains blue can you release the button. The headset is in pairing mode. 2. Switch on the Bluetooth of your mobile phone, add/search devices. 3. When "Bluedio" appears, select it. (If asked for a pass code: Enter "0000") About Bluedio Bluedio is a manufacturer pioneer in portable audio device, providing solutions of professional audio and wireless communication. In 2009, we have registered Bluedio as our trademark in the USA, later obtained certificates from China and the whole world. So far, Bluedio has owned over 30 patents, highly praised by consumers over 34 countries.