"Main Features: Iconic powerful bass resonance of Bluedio: 57mm ultra-large dynamic drivers, turbine style housing, with the iconic Bluedio surging low-frequency shock, let you feel the bass resonate deep in the chest, enjoying the best sound quality. Clear and transparent bass, mids and treble, fully exposed to all the details of song, you can hear what the artists really want you to hear, Coldplay or Linkin Park concert played in your ear Ultra-long operation and carefree calling from Bluetooth 4.1: With robust high speed CPU of Bluetooth 4.1 operating system, comes with ultra-long using of 40 hours music, 45 hours talk and 1625 hours (approximately 67 days) standby time, the same battery, decrease up to 40% power consumption compare to Bluetooth 4.0. Acoustic echo cancellation and noise reduction effectively reduce ambient noise while talking, make far-end listener cannot hear what you said become history, just like talking face to face Customized function: Audio Sharing allows you to connect to another H headphone via an audio cable, share music feast with your friends instantly (recommended to use headphones with impedance of 32 or higher) Simultaneously connect two Bluetooth devices, connects with your phone and tablet seamlessly, listen to music or enjoy foreign blockbusters, do as you think about it Comfortable wearing: Custom fit supra-aural soft earmuffs, artificial protein leather of earmuffs simulated to human skin texture, ensure long lasting comfort in various rugged circumstances Convenience: Just a plug with audio cable(*buy separately), then listen to your favorite tracks without using any battery, no matter how long is your playlist. Specification: Model : H-Turbine Wearing type : Headband Function : Voice control, Answering phone, Song switching, Bluetooth, Multi connection function, Noise Cancelling, Microphone Connectivity : Wireless Connecting interface : USB Application : Mobile Phone Plug interface: Full-sized Driver unit: 57mm Frequency response : 20~20KHz Impedance : 16ohms Sensitivity : 110 dB Power supply: USB port DC 5V Working time: Talk time: 45 hours; Music playing time: 40 hours Standby time: Up to 1625 hours Charging time: About 2 hours Bluetooth: Yes Bluetooth version: V4.1 Bluetooth distance: W/O obstacles 10m Bluetooth band: 2.4GHz-2.48GHz Bluetooth protocol: HSP, HFP, A2DP, AVRCP Package contents: 1 x Earphone 1 x Audio Cable 1 x USB Cable"