It was announced last week but Lezyne have just pushed new firmware for all their 2017-2019 devices. As you can see from the image above they have a sweet range of sizes now. Functionality between the devices is fairly similar, so it’s just the format and price that you mostly need to worry about.
These are usually priced WELL under $/£200 and are fully featured. eg some have colour mapping and most handle power meters.
Indeed the new firmware specifically delivers support for recording FE-C trainer data. Also included is a manual, pre-ride elevation setting.
More of the finer details here at Lezyne.com