1. Support 12V, 5V, 3.3V, 2.5V, 1.2V. If there is no message, it default to 5V for delivery. 2. Immersion gold PCB process 3. The input to output DC drop voltage is the lowest: 0.34V, the input AC must not exceed 12V, and the DC must not exceed 20V. 4. Control the appropriate drop voltage to improve the power conversion efficiency and reduce heat generation. 5. The whole board test ripple is about six thousandths Integrated separate rectification, the input can be AC or DC: Use a disassembled LT1963A power chip on the board colour: black Material: plastic Package Contents: 2 x LT1963 Power Module. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.