This is the new Curveball Jr, a 3 band EQ with a cool 2-step Boost. The Mid has 3 frequencies to choose from, it has a Volume control so you can use it as a tweaked clean boost, and if you Press/Hold the footswitch, it locks the EQ ON....so you can then tap it again for a second side Boost. Very useful pedal, and in this demo I'm showing how you can use it in the Effects loop of your amp to completely change its character. Maybe you'd use it for a few songs, and the cool thing is you can lock it on and use the secondary boost as a solo volume boost. For more information, go to Amptweaker.com.