The input voltage is 4.0 V - 40 V (the input voltage must be higher than the output voltage of 1.5 V cannot be increased), the output voltage is 1.25 V - 37 V, the output current is 2 A (normal and stable) and 3 A max, conversion efficiency 92% (highest), output ripple below 30 mV, switching frequency 15 A. 0KHz With terminal block, no soldering iron is convenient to use and holds the wire connection point. With reverse polarity protection, over temperature and short circuit protection, which makes the use much . With an internal oscillation frequency of 150 kHz, it offers low power consumption and high efficiency. Touch the button to change the measurement input or output voltage, and the indicator light shows which voltage is measured and maintains the last setting even when it is turned off and again. Material:plastic colour:green Package Contents: 2 * adjustable DC-DC downward power converter module Only the above package content, other products are not included. Note: Light 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.