Thank you for purchasing the for Radio to Tuner Converter. This converter allows Radio to easily control the Tuner or other tuners compatible with the four-wire tuner interface protocol. Without needing to change the radio's mission mode or reduce its power, simply the TNR button on the radio, and these adjustments be completed automatically. Radios that have been tested on the machine so far: DX10,FTDX101,FTDX3000,FT991,FT891,FT897,FT857,FT450D. Tuners that have been tested: AH3,AH4,AT120,AT130,AT140,FMJ993,FMJ998,-100,LDG Z-11Pro,Mat-k100. Instructions for Use: 1. Turn on the radio and set the radio's [TUNER SELECT] to [EXTERNAL]. Save the settings and then turn off the radio. 2. Connect one end of the MD8 cable to the converter and the other end to the radio's tuner interface. 3. Connect the other end of the converter to the tuner. Check the connection for errors based on the English markings beside the plug. 4. Turn on the radio, and the green LED on the converter light up. the TNR button on the radio briefly to activate the tuner function-the red LED on the converter light up. To exit the tuner function, the red LED turn off. 5. Long- the TNR button on the radio to start tuner adjustment. Note: 1. The converter cannot mit the frequency sent by the radio to the tuner, so the tuner cannot achieve frequency synchronization like the FC40 tuner.To the correct impedance match, tune the antenna with the radio start tuner each time the operating frequency is changed. 2. The FT710 radio cannot use this converter. 3. The Codan series antennas, such as the 9350 antenna, are also incompatible with this converter. Color:Black Material:Metal Package Contents: 1 * Radio to Tuner Converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.