Features: Small size and lightweight, easy to carry. With a USB port and micro- USB port, convenient to test devices. LCD digital screen, easy to see the current and voltage- of the devices. Test content: battery voltage-, current, discharge capacity, (10 groups of data). It can detect the discharge capacity of the power-bank and calculate the conversion rate of the power-bank. Specifications: Material: Plastic Input-Voltage: 3-15V Voltage-Resolution: 0.01V Test Current: 0.05A-3.50A Current Resolution: 0.01A Capacity Range: 0-19999mAH Accuracy: 1 percent USB MaleandMicro USB Female Input, USB Female Output Color: Black or White Total Length: Approx. 23cm or 9.06in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Current Monitor