Feature:1. The basic use frequency of the handheld radio is 400470MHz, most of the power is 5W, the distance of this two way radio in public calls can up to 58 kilometers. Relay device for communicate over long distances.2. Simple relay, easy to operate and use.3. No need to change any part of the radio, two handheld radios are needed, connect the cable to the external mic/spk port (2.5mm and 3.5mm).4. The relay of the two way radio is used to increase the call distance to more than 10KM.5. K port, use for Kenwood and most brands of radios with the same connector.Specification:Condition: 100% brand newItem type: TwoWay Radio RelayMaterial: ABSColor: As picture shownCable length: Approx. 100cm/39.4inWeight: Approx. 95g Connector: K port (for Kenwood and most brands of radios with the same connector)The relay of the two way radio is used to increase the call distance to more than 10KMTwo-way communication.Operating mode1. Transponder downlink forwarding (differential and conventional relay stations),Machine A acts as the upgoing receiver of the signal, and machine B acts as the downstream transmitter of the signal. The relay purpose has been achieved.2. Two-way forwarding, the machine of the receiver, the machine B transmits. Machine B receives and one machine transmits. Realize two-way forwarding function.3. The relay box used in the audio trigger mode, when in use, the volume of the two way radio that has received the signal is the largest.Scope of application:1. Link between relay station and relay station2. Signal coverage area of relay station signal expansion3. On-site construction of cable erection4. Underground mine5. Cave construction6. Culvert emergency rescue7. V-U section relay8. Small basement and ground two way radio signal connection9. Emergency use in large events and other occasion.Package List:1 x Relay box1 x Wiring