Two programmable count down and count-up, two-digit displays featuring 9-inch light-reflective digits and AC/DC operation. The CTSC includes two 20-watt speakers with horns, 2 legs, internal batteries and chargers, and two convenient start/stop and reset hand-held push buttons. The model SC interfaces with the System 6 Sports Timing Console to provide enhanced shotclock and timing capabilities. The clocks can be integrated with a Sports Timing Console using the included interface box. The clocks also work with the Ultimate Paceclock Controller. For a standalone system check the model CTSC5. (1) 50' AND (1) 200" cable included. 36 x 13 x 4