Cost-effective call center headset; omnidirectional microphone; Hearing protection technology, care of the user's hearing; using the flexible gooseneck metal tube, mic accurate positioning; smart design, suitable for all-day wear; direct rj9 or 2xdc3.5 plug, easy to use . Receiver type: dynamic; microphone type: ecm; connection type:3.5mm/pc/rj9 straight; boom type: gooseneck (serpentine); wearing styles:headband can be adjusted for left or right-ear wear;comfort: leather /sponge earmuffs, ear angle flexible automatic adjustment;