SMAKN Synchronous Buck Voltage Converter DC-DC 24V (15-40V) to 13.8V 10A 138W Power Supply Module Waterproof Input voltage: DC:24V (wide voltage 15V-40V) Output Voltage: DC: 13.8V, the output current:10A 138W Size: 74 * 74 * 32MM (L * W * H) Weight: 0.3KG