Features: brand new and high quality The voltage is the range of the power supply voltage value and cannot be adjusted. The current is adjustable for this load test. After adjusting the desired value, test with constant current. Test the maximum-discharge current of the power supply, check whether the power supply current is real, and use the power product aging test. How many Ware all in the power dissipation of the NMOS tube, and the board voltage is within300V. You can also increase the power in parallel with multiple blocks. The basic circuit form is that TL431 provides reference voltage, sense resistor, LM324 operational-amplifier error amplification. Specifications: Material:Electronic Component Input voltage: 0-15v /0-72V Package Size:Approx.150x150x50mm/5.9x5.9x1.96inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to thedifference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Battery Capacity Tester