PARAMETER - adjustment positions:3; horn hole diameter:1.4mm; length of horn from base: 30mm; parts overall size: 19 x 13.5 mm (L*W); horn overall size: 30 x 28.5 x 13.5 mm (L*W*H).
FEATURE - It's small and easy to install in your RC airplane..
APPLICATION - suitable for RC aircraft, park jets and other RC airplanes scale models.Great for indoor and small electric RC model plane.