Lenovo Yoga Active Noise Cancellation Headphones.

Features:

• Charge while in use without interruption
• Dual Bluetooth device connectivity
• Hybrid ANC (you hear) and advanced ENC (they hear) technology
• Six Boom-less microphones: 4 for ANC, 4 for ENC
• A better way to enjoy what you love
• Tune out the chaos
• Speak & be heard

Specifications:

• Colour: Mica
• Cable Length/Type: 1.3 m
• Weight: 214 g
• Audio Out: NA
• Controls: Power on/off, Multi-function button, Microphone mute/unmute, Volume up/down, ANC level 1 / level 2 / off
• Distortion: < 5%
• Driver: 40 mm neodymium drivers
• Frequency Range: 20Hz - 20KHz
• Impedance; 32Ω