Features: Adjust voltages and current: adjust voltages and current functions to meet different testing needs, strong flexibility. Current and voltages display: display of current and voltages value, convenient for users to monitor and adjust parameters. Aging resistance test: suitable for electronic component aging test and resistance discharge test, help to detect the stability of component performances. Widely used in various USB charging devices power output Digital display: equipped digital display, intuitived display of test data, simple and intuitived operation multiple protections Specifications: Item: USB Triggers Electronic USB Load Resistor Discharge Battery Test Types：LD25 / LD35 DC4-25V Current: 0.25-4.0A Power：25W Fan Speed: about 5800RPM Size:As Pictures Connection： USB Package Includes: 1PCS USB Load Resistor note: There might be some distortions due to different computer resolution. There might be size errors due to different computer resolution.