Slight sticky residue on top of the unit. The Paso DMA2060 Muzak Digital Music Amplifier is a black digital amplifier manufactured in 2015. It supports AM modes and features Dolby surround sound formats. With 4 channels and 4 inputs, this unit offers 2 RCA and banana speaker jacks for audio outputs, with stereo L/R RCA inputs. It has a power output of 15W and is designed with digital features for enhanced audio quality. The amp is suitable for home audio systems and provides a high-quality listening experience for music enthusiasts.