This is a Blackstar HT-20, 20-watt tube guitar amplifier head. The HT-20 is incredibly versatile, having 2 channels (clean and overdrive), built in reverb, and the famous ISF knob on the overdrive channel that allows the amp to be dialed in to either a Marshallesque or Mesa/Boogie like tone.
Loud enough for most small to mid-size venues, the HT-20 has multiple speaker output options for whatever speaker cabinet(s) you use, as well as a direct speaker-emulated output that can be sent straight out to a recording console or front-of-house.
It comes with a one-button, channel switching footswitch.
Try it out today on your next gig or recording!