GODOX AK-R1 can be used with the GODOX V1 Flash GODOX AK-R1 can be used with GODOX H200R round head (sold separately) and GODOX AD200, AD200Pro flash GODOX AK-R1 can be used with GODOX S-R1 adapter (sold separately) and GODOX V860II, TT685, TT6000 flash.