Buttolo Blatter is a must have deer caller for any Roe or Muntjac stalker.  depressing the rubber bulb gives a "Feep" imitating a female deer that will bring a Roe Buck in during the rut.  The intensity of the the call can be muted by covering the holes on the ball to imitate a kid.  Fully depress the rubber bulb gives a shriek.  The tone can be fine tuned via a small turn screw under the ball.  

Full instructions included.