Internal lithium-ion battery runs over 5 hours on a full charge. The 4"H LCD digits are visible up to 150' or more, even in sunlight. Features time, bonus, possession, period, score up to 199, up/down timing to 99:59, 1/100 second in last minute, loud buzzer, and modes for basketball, wrestling, volleyball, and more. Includes full-function key-fob remote, back control panel, and 15'L AC power cord. 24"W x 16"H x 10"D; 22 lb.