R&S®UPP200 Audio Analyzer, Two Channels, R&S® UPP-B2 option built-in: Front View
R&S®UPP400 Audio Analyzer, Four Channels, R&S® UPP-B2 option built-in: Front View
R&S®UPP800 Audio Analyzer, Eight Channels, R&S®UPP-B4 option built-in: Front View