A ball spin: double head every nine rotating choice
A ball frequency: 25-85 times/minutes
The ball speed: 4-50 meters/SEC
A ball radian: double head independent regulation
radian, adjustable scope 40 degrees
A ball placement: double head transverse and
longitudinal 1-22 points wrote
Combination ball:
(1) the built-in 30 sets of combination ball program
(2) the random automatic combination ball
A ball number:
(1) the number of days in the helicopter ball 1-9,
An unlimited range independent choice
(2) the ball total number 1-999 arbitrary
