Super easy to do.
1. Download the 'fw.hex' file from the Magneto Speed website at
https://cdn.shopify.com/s/files/1/0150/ ... les/fw.hex?
2. Copy/paste file onto the micro sd card via your pc/laptop.
3. Eject the SD card from your pc/laptop once the file is loaded.
4. Now insert the SD card into the V3.
5. Press and hold the enter button on the V3.
6. Now insert the bayonet/jack fitting 'BOOTLOADER' appears on the screen.
7. Screen also says 'release enter button'... DONE. The V3 then progresses the update. By way of time, it took less time to type this than it did it to load - it finished before this message did. Have just updated to V3.0.03 (no I don't know what this does..). The V3 is an investment, but a worthwhile one. I reload and shoot out to 1600yds, having reliable velocity data saves me time and money on the range ultimately. Happy shooting.