| Headphone | 
| Headset driver : 40 mm | 
| Frequency range : 20 hz  20 khz | 
| Impedance : 32 and #937; | 
| Max. input power : 30 mw | 
| Sensitivity (spl) :  111 dbm ± 3 dbm | 
| Thd+n at -3 dbfs : -77 db | 
| Dynamic range : 110 db | 
| Battery support : 15 hours (playback); | 
| 20 hours (with anc off) | 
| Battery charge time :  2 hours | 
| Microphone | 
| Thd+n at -3 dbfs : -85 db | 
| Dynamic range : 95 db | 
| Frequency : 50 hz – 8 khz | 
| Active noise : analog anc, up to -30 db, | 
| Cancellation (anc) 4 x microphones | 
| Supports anc off/ : level 1 = -20 db; | 
| Level 1/level 2 level 2 = -30 db | 
| Environment : 2 x dedicated | 
| Noise control (enc) digital microphones | 
| Noise suppression : up to 45 db | 
| Signal-to-noise ratio : up to 19 db | 
| (snr) improvement | 
| Interface bluetooth® 5.0, usb-c (usb-c digital audio standard) | 
| Bluetooth® profile a2dp, hfp, avrcp | 
| Bluetooth® audio | 
| Format support sbc / aac / aptx / aptxll / hp1.7 / msbc | 
| Cable length usb-c to usb-c : 1.3 m braided cable | 
| Usb-c to usb-a : 1.3 m rubber cable | 
| Headphone type on-ear design, fold-flat engineering | 
| Microphone type boomless | 
| Weight starting at 0.43 lbs (195 g) | 
| Supported os  windows 10  android 8.0 or later  ios 10.0 or later | 
| Ship group | 
| (whats in the box) | 
|  thinkpad x1 anc headphone | 
|  carrying case | 
|  1.3 m usb-c to usb-c braided cable | 
|  1.3 m usb-c to usb-a rubber cable | 
|  warranty | 
|  instruction manual | 
| Warranty 1 year | 
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