Gemini 2 - GM-2-BT1, Guitar Power Amplifier from Mission Engineering.
We have no technical specifications for this product
but your help will be much welcomed
Other names: geminigm 2 bt1, geminigm2bt1, gemini gm 2 bt 1, geminigm2 bt1, gemini gm2 bt1, gemini gm 2bt1