LENOVO THINKPAD X1 HEADPHONE 4XD0U47635-R

ACTIVE NOISE CANCELLATION Bluetooth 5.0; USB digital audio Battery charger: < 600 mA; USB audio power consumption: Max 5 V / 50 Ma Black and Iron Grey Controls: Power on/off; Multi-function button; Microphone mute/unmute; Volume up/down; ANC level 1 / level 2 / off O/B