Features: Ensure safety and stability of your USB devices with the FNB38 Current and Voltage Meter, a reliable tool for monitoring of current and voltage. Featuring easy to read LED display, this USB tester supports multiple interfaces and boasts for convenience. Suitable for electronics enthusiasts, engineers, repair technicians, and anyone needing to monitoring device charging. Perfect for use with smartphone charging adapter and computer USB port, providing accurate current and voltage detection. With its metal construction, this USB tester is withstanding frequent use, making it essential addition to your toolkit for ensuring device performances. Specifications: Component:Metal nput voltage: 4-24V Input current: 0-5A Input power: 0-120W Equivalent internal resistance of load: 0-9999.9Ω Size:Approx.69x30mm/2.72x1.18inch Package Includes: 1Pc USB Tester note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.