The stylish Jabees Yoyo Bluetooth stereo headphone incorporate 2 pieces of 40mm 32Ω neodymium dynamic speaker, delivers 50-8kHz powerful well-balanced sound performance, refined diaphragm ensure the sound is lifelike and detailed. Supra-aural artificial protein leather earpads and headband provide ultimate wearing comfort. The earpads also can be move up and down without seizing your hair. Foldable and compact design of Yoyo give you biggest convenient on the go. Audio line-in via 3.5mm cable ensure your music never stop even running out of battery. DSP noise reduction may decline partial ambient noise during calls. Control buttons for wireless music and calls, such as play/pause(pick/drop calls), next/previous track, volume up and down. Extra humanized functions such as connect with 2 phones simultaneously, battery meter on iOS devices, English and Chinese voice prompt, voice dialing/redialing and support VOIP connect with computer for online chat. Specification Bluetooth: V3.0 Operating Distance: Up to 10m(open space) Bluetooth profiles: HFP /HSP/A2DP/AVRCP Frequency Response:50-8kHz Impedance: 32ohm Music playback time: 8hrs Talk time: Up to 12hrs Standby time: up to 250hrs Product dimension: 215 X 160 X 51mm Weight: 215g What's in the box 1 X Jabees Yoyo Bluetooth headphone 1 X Pouch 1 X USB charging cable 1 X 3.5mm flat audio cable 1 X User manual