This DL4 has some unique features on it, including an expression knob that gives you 2 more presets than usual by just turning the knob all the way right or left. It also lets you easily adjust your delay time on the go. It has an out for an external tap tempo on the right side(see pictures). The door switches have been replaced and the volume drop has been fixed. Also, the lights have been changed from red to a bright blue. The power adapter come included, and I'll ship it in its Original box with the JHS mod info! I hope this helps, thanks for checking it out!