MOD. PS 1101 PRG920 alternative for PRG 911 -I 1342651 51752 obsolete, no replacement; DFS?LASER?TX obsolete, no replacement; DFS LASER DFS LASER RX (obsolete) PRG 911-I DFS LASER RX obsolete, replaced by DSP/LASER - TX AL 2 DFS LASER TX obsolete, replaced by DSP/LASER - TX 470722 B obsolete, replaced by DSP/LASER Kit; MSD (old name DFS ) PRG11-I DFS LASER RX Obsolete, no replacement; DFS laser RX Obsolete, no replacement;