I used it to program my Icom IC-2100H and Icom IC-2820H amateur radio. Very fast on my desktop, took about 5 seconds to read. I set the voltage jumper to "3.3 volts". For Icom radios, a 1N914 jumper or other switching diode between "RXD" and "TSD", with the cathode (the part with the lead) labeled "TXD" and the anode labeled "RXD" connected is. Then run a cable from "RXD" to the "ring" of the 3.5mm jack plug (for headphones) and connect "GND" to the "shield" of the 3.5mm jack plug.
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