HEADPHONEHEADSET DRIVER : 40 MMFREQUENCY RANGE : 20 HZ 20 KHZIMPEDANCE : 32ΩMAX. INPUT POWER : 30 MWSENSITIVITY (SPL) : >111 DBM ± 3 DBMTHD+N AT -3 DBFS : -77 DBDYNAMIC RANGE : 110 DBBATTERY SUPPORT : 15 HOURS (PLAYBACK);20 HOURS (WITH ANC OFF)BATTERY CHARGE TIME : <2 HOURSMICROPHONETHD+N AT -3 DBFS : -85 DBDYNAMIC RANGE : 95 DBFREQUENCY : 50 HZ - 8 KHZACTIVE NOISE : ANALOG ANC, UP TO -30 DB,CANCELLATION (ANC) 4 X MICROPHONESSUPPORTS ANC OFF/ : LEVEL 1 = -20 DB;LEVEL 1/LEVEL 2 LEVEL 2 = -30 DBENVIRONMENT : 2 X DEDICATEDNOISE CONTROL (ENC) DIGITAL MICROPHONESNOISE SUPPRESSION : UP TO 45 DBSIGNAL-TO-NOISE RATIO : UP TO 19 DB(SNR) IMPROVEMENTINTERFACE BLUETOOTH® 5.0, USB-C (USB-C DIGITAL AUDIO STANDARD)BLUETOOTH® PROFILE A2DP, HFP, AVRCPBLUETOOTH® AUDIOFORMAT SUPPORT SBC / AAC / APTX / APTXLL / HP1.7 / MSBCCABLE LENGTH USB-C TO USB-C : 1.3 M BRAIDED CABLEUSB-C TO USB-A : 1.3 M RUBBER CABLEHEADPHONE TYPE ON-EAR DESIGN, FOLD-FLAT ENGINEERINGMICROPHONE TYPE BOOMLESSWEIGHT STARTING AT 0.43 LBS (195 G)SUPPORTED OS WINDOWS 10 ANDROID 8.0 OR LATER IOS 10.0 OR LATERSHIP 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 MANUALWARRANTY 1 YEAR