Ultra-small LM2596 Power Supply Module DC / DC BUCK 3A adjustable buck Module Regulator Ultra LM2596S Compatible With Arduino by Atomic Market Input voltage:3-40V Output voltage:1.5-35V(Adjustable) Output current:Rated current is 2A,maximum 3A(Additional heatsink is required) Dimension:45*20*14mm(L*W*H) High Quality Atomic Market Product