PARAMETER - adjustment positions:4; horn hole diameter:1.6mm; length of horn from base: 20mm; parts overall size: 16.5 x 11 mm (L*W); horn overall size: 20 x 21 x 11 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.