Classic FLARM F4-F9

The old Classic FLARM devices were introduced more than 15 years ago and have now been deprecated for several years. Some of them are however still used mostly in gliders and they are fully interoperable with more modern FLARM devices. Users of these old devices are advised to upgrade to PowerFLARM, with tripled detection range, antenna diversity, better interference protection, transponder and ADS-B receiver and more intuitive obstacle warnings.