1. Adjustable output voltage range of 1.25V - 37V continuously adjustable (1.5V input voltage must be higher than the output voltage). 2. Maximum output current up to 3A, normal and stable operating current of 2A, With a voltage meter display, the use of advanced microprocessors, range 4 - 40V. (Note:To accuracy voltmeter, please that the input voltage is 4V above) 3. With power indicator light 4. Tap the right button to switch the input or output voltage measurements and has a light display which is being measured voltages, and save the settings, even then boot off 5. Voltmeter can be turned off when not needed can easily touch the left button With terminals, no soldering iron can also be easy to use, and retention wire connection points. Using the internal oscillator frequency 150KHz, belongs to the second generation of switching voltage regulator, power consumption, high efficiency. With overheat protection and short circuit protection. Input voltage:4V-40V Output voltage:1.25V-37V (adjustable) Output current:3A (maximum) Conversion efficiency:92% (high) Output ripple:Less than 30mV Switching frequency:150KHz Operating temperature:-45℃-+85℃ Note:Due to different production batches, there are differences in silk screen printing/appearance, which does not affect usage. Colour:Green Material:PCB+electronic components Package Contents: 2 * Adjustable DC-DC Step-Down 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.