Scoreboards are recommended for big sport halls and high level competitions.
Digits height: 15, 18, 25, 30 cm.
Digits height 15: player numbers, fouls and points
Digits height 18: 3 x players number and penalty per each team
Digits height 25: period and team fouls
Digits height 30: 99:59 up/down timing, 0-199 score
Indicators 4 cm: possession and time out