... CCC,CE 3.MIC type:collar or clip 4.property:commonality 5.no distortion,no interference ... collar & clip microphoneFeature/Function:1.MIC Types :headphone, collar or clip,ear-hanging MIC.2. ... ,USB upgrading.Lithium battery.6.It can work for 33 hours continue,standby time:70days.7.Multichannel ... after it is returned.Buyer must pay return postage for any return reason, no exception. In return, ...