Edifier K750W Wireless Stereo Headset with Microphone K750W Wireless Stereo Headset with Microphone Clear Calls: Dual noise-canceling mics with foam windscreen for clear communication. Quality Sound: 40mm dynamic drivers for natural, high-quality audio. Long Battery: 33h talk time or 55h music playback on one charge. Comfortable Design: Memory foam ear pads, detachable mic, customizable EQ via EDIFIER ConneX App. Multi-Functional: Multipoint connection, volume limit <85dB for safe listening.