Powerful bass resonance of Bluedio: 57mm ultra-large dynamic drivers, turbine style housing, with iconic Bluedio surging low-frequency shock, let you feel the bass resonate deep in the chest. Clear and transparent bass, mids and highs Ultra-long operation and carefree calling from Bluetooth 4.1: 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(Shooting Brake) headphone via audio cable, share music feast with your friends instantly(recommended to use headphones with impedance of 32 or higher). 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. H-turbine also incorporate 4 languages voice prompt(Chinese, English, French, Spanish) ASIN B00LA80Q Product Information Size: !Only Bluetooth 2.0 | Color: White Technical Details Part Number HTW01 Item Weight 7.7 ounces Product Dimensions 7.2 x 6.9 x 3.4 inches Item model number HTW01 Batteries: 1 Lithium ion batteries required. (included) Size !Only Bluetooth 2.0 Color White Power Source DC Item Package Quantity 1 Special Features volume-control Batteries Included? Yes Batteries Required? Yes Battery Cell Type Lithium Ion Average Battery Life 1625 hours