... with MIC. Designed for left or right ear use with 360 degree rotating. Adjustable headband to fit most head size. 1,Type:Computer ... Bluetooth Headphone With Microphone 2,Frequency Table:2.4026GHz-2.480GHz3,Calling Time:8hrs4 ... ,Speaker Diameter:30mm8,Microphone:6*5mm-42*B+3dB9,You can use it to enjoy music from the computer,the sound quality ...