• 30+ HOURS OF PLAYBACK TIME: Functions both as a wireless streaming headphones and hands free smartphone communication device. The built-in rechargeable battery provides up to a whopping 30+ hours of playback and talk time after only 2 hours of charging; always know remaining battery level with a handy indicator on iOS devices. • SUPERIOR STEREO SOUND QUALITY: Japanese voice coil enables the headphones to produce perfect thumping bass, dynamic balanced mid-range and clear highs with high fidelity; noise isolating design excels at attenuating noise by passively blocking environmental sound; provides you an ideal listening experience. Comfortable for your daily usage or even on the running gym. • BT CSR 4.1 & CVC 6.0: Bluetooth CSR 4.1 allow 10 meter/33 feet range with full bandwidth transmission, no loss of audio performance. CVC 6.0 digital noise reduction technology, filters ambient noise that enhances the sound further when answering phone calls or while listening to music. Both features are a must for a high definition surround sound experience.