ITEM NAME:DC-DC 3A Buck Converter Step Down Diy Kit Electronic PCB Board Module LM259 Y8Q4 DC-DC 3A Buck Converter Step Down Diy Kit Electronic PCB Board Module LM259 Y8Q4 Input voltage: 4V-35V Output voltage: 1.23V-30V Input current: 3A(maximum) DC-DC Buck Converter Step Down Module LM2596 Power Supply Conversion efficiency: 92%(highest) Switching frequency: 150KHz Output ripple: 30mA9maxmum) Color: as shown Material: pc+ metal Package Contents: 1*ADJ Power supply module.Input current: 3A(maximum).