About this item Comfortable Design: Beat the workday blues with music on Zeb-Thunder wireless headphone that comes in an ergonomic design a perfect fit and design for long hours use. Microphone sensitivity -40dB ±1dB. Microphone impedance 1.2k Ω Soft & comfortable earcups: Listen to music, podcasts and more for long hours with soft ear cups making it super comfortable for daily wear Adjustable headband: Adust your headband to your comfortable best while you work or listen to music 9hrs Playback Time: Fall in love with the audio experience with 9 hours of playback time to keep you going. Sensitivity : -113dB ±3dB Superior Sound Quality: Magnify every speck of sound with superior sound quality on Zeb-Thunder wireless headphone Call Function: Enjoy online conference, online classes, calls hands-free with a built in mic on the headphone Multi Connectivity Options: Be spoilt for choice with multi-connectivity options like like BT, 3.5mm AUX input, FM and MicroSD card.