The most flexible and powerful pace and game clock ever made. Using the hand held programming pendant, enter sets, build them into workouts with send off tones and save them all in permanent memory. E-Z mode allows quick programming of a time with multiple reps. Use it as a stopwatch, with splits to the hundredths. The Game Clock counts up or down, and can be reset. Link multiple SWIMCLOCK/SWIMCOUNTS together and program with one programmer, to run synchronously. Super bright 6.5 inch red LED diplay is easily visible indoors or out. SWIMCLOCK has no moving parts, case is ruggedaluminum with Plexiglass lens. Optional internal, rechargeable 12VAC battery has a charging light and intelligent charging circuit so you cant over charge. 20+ hours of continuous operation per charge. All parts and labor covered by 5 year limited warranty (except batteries-2 years).