The wide speed range makes this machine a superb choice for all beginners. Due to the small size and light weight it can be stored easily and fits in almost all car trunks. A good choice for sports lessons in schools as well as for private use. The ball feed rate is electronically variable from one ball every 1.5 seconds to one ball every 10 seconds. The ball trajectory is manually adjustable from groundstroke to towering lob. The oscillator delivers shots randomly across the court.