SR-628 Duplex Repeater Controller
The SR-628 is a multi-function and cheaper device that connects any handheld or mobile radio.
By equipment and so on our assemble the build, the new generation trunk-line board, the internal structure design are finer, the outward appearance is more attractive. Besides can provide a the basic repeater function which has following the receiver transmitter, furthermore has the Simple connection, provides the more ideal 2-way radio conversation region for you, causes you maintains the relation in the bigger operating region.
Working mode
- The transponder downlink forwarding (differential and conventional relay station), a A machine as a signal of uplink receiver, B machine as the signal downlink transmitter.  or B machine as a signal of uplink receiver, A machine as the signal downlink transmitter. Has reached the relay purposes
- Bidirectional forwarding, machine of a receiver, B machine emission. B machine to receive, machine of an emission. To achieve bidirectional forwarding function.
- The relay box for audio trigger mode, when in use, the as received signal walkie talkie at full volume!
What's More:
- Two mode select function by DTMF.
When the radio units are connected, the received signal on a radio unit will be real time transmit on the other radio unit.
e.g. VHF/VHF, UHF/UHF, VHF/UHF or UHF/VHF modes

Mode1 ( default)
 Machine A is  transmitter When channal B is receiver.
 Machine B is  transmitter When channel A is receiver .
Mode 2 (##613)
 Machine A is  transmitter When channal B is receiver.
Not function when Machine B is receiver.
 
The purpose can be done in two different places and using different frequency bands intercom, through our mutual communication relay station.
This is a radio cross band duplex repeater controller. It is an easy of operation and cost effective and highly flexible platform for setting up bi-direction cross band duplex repeater with mobile radio and handheld radio.
The SR-628 has 2 audio ports input and out , they are used to connect with mobile and handheld radio. DTMF remote control function with password protection is available in the . User can control the repeater ON or OFF remotely by DTMF. Multi-LED display 2 of radio status , and build-in battery Level
Major Features
Works with most popular handheld radios
Multi- LED display 2 radio status , And controller Battery Level
Real time duplex repeater with link radio
Allows user to change the DTMF remote control password by radio
Operates on both build-in Li-ion battery 72 hours long life operation
External DC 5~24V power supply
DTMF remote control repeater function ON and OFF with password protection 
Professional manufacturer low power consumption .
 PACKAGE CONTAIN
1 x SR628 Duplex Repeater Controller
1 x 100-240V power supply to  USB +5V
1 x USB to DC jack cable 
2 x 48-+50-Y1 CABLE FOR YAESU FT-2800 FT-2900 TYT TH-7800 TH-9800 TYT TH-7800 TH-9800