The TKR-750 has a high-power output of 50W while the TKR-850 offers 40W. Repeaters can function as a base station or repeater backup unit to suit various applications. The built-in 16 channels are pre-set and selectable from a remote control utilizing the remote I/O connector or pre-programmed key on the front panel. The programmable function keys located on the front panel permit adjustment and testing of repeater sites. In addition, single priority scan is available when the unit is operating in simplex mode.