Kiefer KAP7 Water Polo Shot Clock System Battery Powered Control Unit The KAP7 Kiefer portable wireless Water Polo Shot Clock System doubles as a Pace Clock. Durable molded polyethylene body with bright red LED display can be use indoors or outside in any weather. Shot timing and timeouts (FINA/NCAA selectable). 7” LED digital display also operates in stand-alone pace clock mode. No power or communication cables are required. Integrated energy-saving features.Additional displays optional (12V rechargeable/ smart chargers) #600904D System includes (1) Battery powered control unit [4AA] and (2) display units with horns.