The predecessor Winners Commerce of Rosa Sports developed the world’s first kickboard in 1998 and largely exported it to Japan and the United States. Afterward, the company changed to Sun Topia (www.suntopia21.co.kr) and established Rosa Sports as an offshoot in September 2009 to develop tennis items. Rosa Sports currently has seven registered patents and steadily supplies products to the market. We produce safe boomerangs and Frisbees, such as “Rosa Frisbee,” “Rosa 100 Meter Frisbee,” and “Jelly Frisbee,” and supply them to schools for educational purposes. We also produce and sell SS Tube, a safe speed buoyancy tube for use when in risk in water.
This product doesn't have to supply electric power. You can practice all kinds of tennis movement like pro player with one tennis ball.
Also, you can set the smashing place in 1~5times at once.