Input voltage range: AC 5V-30V, DC 5V-50V Output range: DC 3.3V-33V Adjustable AC/DC to DC buck converter power supply module Voltage regulator Input AC voltage: AC 5VAC 30V or DC 5V50V Due to AC voltage fluctuations, the recommended AC voltage range has been adjusted accordingly Power module features plug-in LM2596HV, a high-voltage version of LM2596 Maximum input voltage is 50V (limited by filter capacitor voltage) With external radiator, capable of handling high current operation Material: Plastic Color: Black Package Contents: 10 x LM2596HV AC/DC to DC Buck Converter Module Note: Other items not included Note: Lighting and display differences may cause slight color variations between image and actual item Measurement error allowed: +/- 1-3 cm