Technaxx MusicMan BassHead MP3-Stereo. Ear coupling: supraaural, Wearing style: Head-band, Headphone frequency: 20 - 20000 Hz. Connectivity technology: Wired, Headphone connectivity: 3.5 mm. Weight: 147 g. Battery life (max): 12 h, Battery recharge time: 2 h, Battery technology: Lithium-Ion (Li-Ion). Cables included: Audio (3.5mm), USB