SMAKN&reg; Mini DC-DC Converter Adjustable Step Down Module Power Supply input 4.5-28v Output 0.8V-20V Input voltage:4.5V-28V. Output voltage:0.8V-20V Output current:maximum 3A(Additional heatsink is required) Work temperature:-45 centigrade- +85 centigrade dimension:22mm*17mm*4mm(L*W*G) NOTE:This can't be used to step up Voltage