Broadcasters large digital clock display with front panel mode switch to select on-the-fly between clock or timer.Ultra bright 2" high digits, 14" wide x 5.25" tall, 4" deep. Rear panel connector for remote control, serial datainput, and a "wall-wart" power supply. 10 hour 9V battery back-up. Supplied with wall mount brackets. Choose MB model (internal Master board) to create a master clock for syncing all clocks in your facility. Choose GPS model to drive up to 50 digital and 5 analog clocks with CAT3 wire (only one GSPmodel needed per clock system)