SB-300 and SB 301..........Hamband only....Style and size matched the SB-400 and SB-401. SB-310 Short wave reciever (Same size as SB-300 and SB-301) SB-303 Hamband only, Solid-state and smaller cabinet size SB-313 Short wave reciever, Solid-state Same size as SB-303 73......de............ Al W8LRM St Joseph, Michigan on Michigans Sunset Coast