Description: 12V to 5V and 3.3V Voltage Conversion Step Down Board Power Converter Module. Applicable to a variety of LCD TV monitors to meet the power requirements of the weak current equipment. Size: 50x32x10mm / 1.97x1.26x0.39inch. Input: 12V; Output: 12V, 5V, 3.3V. Three interfaces: P2 is the power supply 12V input interface: 12V 12V GND GND; P3 is the output interface: GND GND ADJ SW 12V 12V; P4 is output interface: ADJ SW GND GND GND GND 5V 5V 3.3V 3.3V. Package Includes: 1 Piece Power Converter Board Note: Please allow slightly measuring deviation due to manual measurement