B-Stock, Shure AONIC 4-BK - Sound Isolating In-Ear with RMCE-UNI cable; Hybrid of dynamic driver and balanced-armature driver; sensitivity: 106 dB SPL/mW; frequency range: 20 Hz - 19 kHz; impedance: 7 Ohms; black; 3.5 mm TRRS jack for Android and iOS; inline microphone for phone calls and voice applications; weight 21.1 g; incl. 6.35 mm adapter, Soft Flex and foam earpieces in S/M/L, yellow foam earpieces, Triple-Flange earpieces, Storage box, B-Stock with full warranty, may have slight traces of use