Single space rack mount Rocktron compressor / limiter / Hush NR. Features: Compressor: Compression Attack Release Limiter: Peak Limiter Bypass Hush II Noise reduction (works great!) Also features input gain lights / output gain lights (switchable), and compressor amount lights. Also has overall output volume control. Easily place this in your effects loop for complete control over compression and noise reduction. Works great. Unit shows some wear. Asking $80, plus shipping. SOLD!