The Dual USB Voltage and Current Tester is a useful tool for measuring the load and performance of USB devices and chargers. It allows you to easily check the voltage and current output of any USB port and project, providing valuable information about power consumption. This plastic dongle is inserted between a USB device and a USB port, allowing the data lines to pass through. It features a 0.05-ohm resistor in line with the power pin, which is used to accurately measure the current draw of the connected device. The digital display on the tester instantly shows the voltage and current readings, making it convenient for testing devices like chargers, cables, and cell phones. Key Specifications: Voltage Range: 3.3V-9V Current Range: 0-3A (capable of measuring up to 5A) Voltage Display: Red LED Current Display: Blue LED Output: 2 USB ports Size: 52mm x 34mm x 12mm Weight: 16g Features: No-Load and Overload Measurement: The tester can measure USB devices both at no load and under load conditions, making it suitable for testing USB terminals and chargers. Easy to Use: The current and voltage are displayed alternately on the bright LED segment display, making it simple and practical to read. Portable and Convenient: With its small size and lightweight design, it is easy to carry around and does not require an additional power supply. Wide Application: The tester can be used with a wide range of devices, including mobile phones, electronic products, and other USB-powered devices. Specifications: Measuring Range: Voltage DC 3V – 9V / Current 0 – 3A (capable of measuring up to 5A) Accuracy: Voltage <±1%, Current <±2% Interface: USB 2.3, USB 3.0 Dimensions (L x W x H): 7.32 x 2.8 x 1.5cm Weight: 25g The Dual USB Voltage and Current Tester is a handy and practical tool for anyone working with USB devices, providing essential data for testing and troubleshooting USB-related projects.