ZEBRONICS ZEB-THUNDER Bluetooth Headset (Red, On the Ear). Soft & comfortable earcups: Listen to music, podcasts and more for long hours with soft ear cups making it super comfortable for daily wear. eat 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 ?. Adust your headband to your comfortable best while you work or listen to music. Fall in love with the audio experience with 9 hours of playback time to keep you going. Sensitivity -113dB ?3dB. Magnify every speck of sound with superior sound quality on Zeb-Thunder wireless headphone. Enjoy online conference, online classes, calls hands-free with a built in mic on the headphone. Be spoilt for choice with multi-connectivity options like like BT, 3.5mm AUX input, FM and MicroSD card.