LXNAV V8+ variometer upgrade (any old vario -> V8+).
Upgrade any old variometer (like USB-D, V5 or V9) to a V8+ variometer.
The V8+ is a complete replacement of the old variometer (no different cabling or attachment required) and functions with every LX80xx or LX90xx device.
The old variometer unit needs to be returned to us.