How to make a long talk distance of the radios? such as Retevis RT76
1、Connect the power amplifier, such as Retevis RT91(Note: the walkie-talkie antenna is detachable)
2、Connecting to a repeater, such as Retevis RT97.
3、Use in high terrain and open environment.
If it is a license-free radios, it can be used with the walkie-talkie long antenna.