DT-100 Desktop User Station for bank window Product Description This equipment is designed for public informing .it used to be used for railway station,TV station ,broadcast station and big conference.portable is made it could be easily to move;3.5mm earphone could output very quility sound;microphone jack,volume and sidetone adjustment system and call back fuction,all of them are convenient for you ;the peculiarly design is the hole behind which could be hanging on the wall or somewhere you wish to.