This is the "CB-40" bass amplifier. It's a rare solid-state combo amp released from the late 1970s to the early 1980s, and it was well-regarded, similar to the CUBE series of the time. Product Information Manufacturer: Roland Model Name: CB-40 Category: Bass Amplifier (can also be used as a guitar amplifier) Features: A compact combo type with 40W output, characterized by a clear and uncolored sound. Main Features Type: Solid-state (transistor) combo amplifier. Output: 40W. Controls: Two input jacks: High/Low. 3-band EQ: BASS, MIDDLE, TREBLE. Volume control. "SPECTRUM" control filter. MONITOR INPUT jack (can also be used as a line out). Country of Manufacture: Japan. This is an early Roland model, and it's characterized by the "SPECTRUM" switch, which was unusual for the time. Everything in the images is included in the sale. The cover is included, although it has a tear as shown in image 13. This is a used item stored by a private individual. Please check the photos carefully, and refrain from purchasing if you are overly concerned about condition.