This mod will expand the transmit range from 137-175 Mhz and 410-470 Mhz
- Remove battery
- Remove the (3) small black screws.
- Carefully open the radio, spliting the radio front and rear cases Looking down inside of the top left side of the radio (left of rotary encoder) , locate and ADD Solder to jumpers "0" and "1" (jumper "0" is the top jumper and jumper "1" is below it)
- Assemble radio.
- Press and hold [M/V] and [AR] keys while turning on the radio.