Description:Listening through walls.-Special pull back vechicle with secret listening device.-easy to listen all the action.-High sense metal probe.-Coming with earphone .-small as a jelly-complete function:charge hole，earphone hole and switch knob upside-easy operate，cling to the door，window or wall-Able to get the sound out from the wooden/brick wall， windows or door or armor plate-High sensitivity detectorPackage:1*Ear Listen Through Wall1*Earphone1*USB cable