Players, coaches, referees and fans will know how much time remains for the offense to attempt a shot with the Wireless Basketball Shot Clocks. The shot clocks' large LEDs display how much time is left for the offense in bright red numbers, while the timers above display the time remaining in the period. Scorekeepers can keep the clocks running with the built-in rechargeable batteries or plug them in to an outlet with the AC power cord, and fans and referees can keep their eyes on the game as built-in horns sound if there is a shot clock violation. LED shot clocks display 8 in. red numbers for viewing the remaining seconds to put up a shot from up to 300' away Game clock stands out in yellow digits above the shot clock Loud-sounding horns can be used to signal a shot clock violation Colored numbers against a black display make it easy to reference the game's progress Officials and scorekeepers can easily operate the clocks from across the court with the included controller Intended for indoor use only. Specifications: