LCD Screen with information track and FlashlightCrystal clear and full-range sound let you feel the music coming with details realized through B570 unexpected 57mm ultra-large dynamic drivers with Bluetooth4.0 and DSP noise reduction.Foldable Design & Comfortable Wearing Experience: the headphone is 198g only, foldable and easy to carry; the head beam made of high quality artificial leather, earmuffs are made of soft breathable protein leather, providing you comfortable wearing-on experience.Line-in Music Play Mode:you can use 3.5mm audio cable connect to headphone to listen to music even your phone don’t have Bluetooth function or the headphone is out of powerFull package with Built-in microphone, FM radio and MP3 player via TF card functions.1. Color:?Black, White sliver, Black grey, Black brown, White blue, White pink?2. Bluetooth Version: V4.03. Working Range: Up to 10metes?4. Dimension: 151mm*79mm*180mm?5. Net Weight:?195g6. Speaker:?32? 40mm7. Output Power:?200mw8. Frequency Response: 20Hz-20KHz9.Signal-to-Noise:?80dB10. Distortion: ?1%11. Battery Charging Voltage:?DC5V12. Battery Charge Time: 4hours13. Music?time:?8-10hours14. Standby time:?20days15. Micro SD support: 32G (Max)LCD Screen with information track and FlashlightCrystal clear and full-range sound let you feel the music coming with details realized through B570 unexpected 57mm ultra-large dynamic drivers with Bluetooth4.0 and DSP noise reduction.Foldable Design & Comfortable Wearing Experience: the headphone is 198g only, foldable and easy to carry; the head beam made of high quality artificial leather, earmuffs are made of soft breathable protein leather, providing you comfortable wearing-on experience.Line-in Music Play Mode:you can use 3.5mm audio cable connect to headphone to listen to music even your phone don’t have Bluetooth function or the headphone is out of powerFull package with Built-in microphone, FM radio and MP3 player via TF card functions.1. Color:?Black, White sliver, Black grey, Black brown, White blue, White pink?2. Bluetooth Version: V4.03. Working Range: Up to 10metes?4. Dimension: 151mm*79mm*180mm?5. Net Weight:?195g6. Speaker:?32? 40mm7. Output Power:?200mw8. Frequency Response: 20Hz-20KHz9.Signal-to-Noise:?80dB10. Distortion: ?1%11. Battery Charging Voltage:?DC5V12. Battery Charge Time: 4hours13. Music?time:?8-10hours14. Standby time:?20days15. Micro SD support: 32G (Max)