Most of repeater has its own center frequency point. It can’t be changed after leaving the factory. That’s why we need to contact the seller if we can customize the repeater frequency before making the order. Otherwise we will receive a default frequency and it maybe not suit for us. Retevis RT97 support to customize. We need to supply the transmit frequency and receiving frequency to the seller. Retevis RT97 is a single band analog repeater, UHF or VHF. Both bands can be customized. Repeater systems use two different radio frequencies. The radio transmit on one frequency, and the repeater receives those transmission and transmits on a second frequency. So all the repeater transmit and receive frequencies are different. …
