Sorry, Sold in one hour. In a separate ad below, I have a transponder and a beacon.
I have an e-data key for a Mychron 4. It was never used with the MyChron that I bought with it and sold right away.
This data key, which looks and works like a jump drive ( as shown in the picture ) , temporarily plugs into the Mychron and all the Mychron’s data can be transferred ( I don’t know whether that’s called “uploading” or “ downloading” – you computer geeks would know ) to the data key. Then you take the key and plug into a lap top and you can display and analyze all the data that was on the Mychron.
This device is listed in the Comet Catalogue for $85, but I’m selling for only half price.