EncorePro Wideband Monoral NC Headset Monaural over-the-head headsetMonaural (covers one ear)Quick disconnect (requires PL-M22 or PL-P10 adapter)SES tone switchClick-stop headbandFlexible ear pieceNoise cancelingAdjustable clothing clipBlack and grayADDITIONAL/REPLACEMENT PARTS:PL-29961-01:Clothing clip PL-40707-01: Value pack (Encore,H91, H101) (PL-HW291N will ship)

The end is the same –quick disconnect as HW291N.

Here are two pictures of how it looks on the front and back.