This mini true bypass looper is encased in a Hammond enlcosure (3.64" x 1.52" x 1.06"). The looper uses a heavy duty 3PDT switch, Switchcraft jacks secured with lock washers, and a bright led (your choice of color) encased in a chrome bezel with glass lens for optimum light distribution. Power connects via a standard 2.1 5.5mm Boss style 9V DC jack. The Mini-Looper can also be used without power. Choose from three LED colors: Blue, Red, or White.