Two Countdown Second Timer: Set as 14 seconds and 24 seconds by default. About this item QUICK PRESET & CUSTOM MODE--Our Basketball Shot Clock Timer features one-touch access to popular countdown presets (14s, 24s, 25s, 30s, 35s, 40s, 60s) and supports fully customizable timing (0-99s), also with count-up/down modes for versatile game management 9., 5x6., 3 inch Shot Clock: Made of 5 inch LED lamp tube,high brightness & good visibility, see it more than 120 ft away How Does A Shot Clock Work In Basketball at Helen Ball blog Countdown Clock Basketball 24 Second Shot Clock And Game Time – Tripl3 Shot LED Shot Clock For All Sports Stopwatch built in rechargeable battery GANXIN Basketball Shot Clock Timer,12242530354060 India | Ubuy Power Supply: Clock support wired cord and extra battery to powered. Up to164 ft of control range can easily to meet the needs of use