This product is very convenient to use. It has two sets of systems. As long as you plug in USB or Micro-USB, or Type-C, you can output adjustable voltage from 1.0V to 24V under the power system (PER), with 2-3W power. Also can test power, capacity, time, very suitable for technical engineers research and develop ment, debugging instruments, after-sales engineers on business maintenance; s product can also measure the current ambient temperature, very convenient. Power system PER: 5V to 1.0V to 24V Head System VAH: It can measure voltage, current, power, capacity and time, ju like a multimeter. Color:Black Material:PCB Package Contents: 1 * 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.