b 34 the output power is 100 watts 107 switch 3 108 is arranged to select the control channel of the radio when switch 3 is in the position designated 34 a 34 the control channel selected is channel a 109 when switch 3 is in position designed 34 b 34 the control channel selected is channel b 110 the mobile radio 120 is equipped with a location determining device 101 which in turn is arranged to control the position of switch 1 102 switch 2 105 and switch 3 108 in this embodiment the location determining device 101 is capable of determining whether the radio is located in location a the urban area or location b the rural area when the location determining device 101 determines the radio is located in location a it causes switch 1 102 to reside in position 34 a 34 thereby causing the radio to operate on the 800 mhz band also when the location determining device 101 determines the radio is located in location a it causes switch 2 105 to reside in position 34 a 34 thereby causing the radio to transmit at 10 watts power output finally when the location determining device 101 determines the radio is located in location a it causes switch 2 105 to reside in position 34 a 34 thereby causing the radio to transmit at 10 watts power output finally when the location determining device 101 determines the radio is located in location a it causes switch 3 108 to also reside in position 34 a 34 thereby causing the radio to use channel a as a control channel when the location determining device 101 determines the radio is located in location b it causes switch 1 102 to reside in position 34.