Backfire Halo remote is based on the 5th Generation Esc system, developed by Backfire, currently in use for Backfire Hammer Sledge, ZEALOT S2 and ZEALOT X.  However, it does not pair with other Backfire models on the 3rd generation system, and it is not compatible with other models on the market with Hobbywing or Lingyi esc either. 

Halo Remote is discontinued due to supply issues, and the R5 Remote is the recommended replacement. The R5 Remote is compatible with all boards that previously used the Halo Remote.