SMAKN&reg; B3603 4 Digital DC-DC Constant Voltage Current Step-Down Module 6V-40V Product Name : DC-DC Constant Voltage Current Step-Down Module;Model No. : B3603 Input Voltage : DC 6V-40V;Output Power : 0-36V, 3A Module Size : 6.6 x 5 x 2cm/2.6" x 2" x 0.8"(L*W*T);Main Color : Green, Black Main Material : FR4, PCB, Plastic;Weight : 35g Package : 1 x DC-DC Constant Voltage Current Step-Down Module