Product Description for Dual USB Voltage and Current Tester Enhance your charging efficiency and safety with our Dual USB Voltage and Current Tester. Designed for versatility and precision, this tester is an essential tool for anyone looking to monitor and optimize the performance of their USB chargers and devices. Charging Performance: Equipped with an intelligent charging recognition IC, this tester automatically matches high current charging, enabling you to charge two different USB devices simultaneously. Experience optimal charging performance without compromising speed or efficiency. Compatibility: This tester is compatible with all original chargers, including those from the iOS series. It uses the chargers USB port for charging identification without requiring any modifications, ensuring seamless integration with your existing devices. Data Communication: When connected to a computer, this tester allows data transfer between the computer and a connected mobile device, such as a smartphone. Monitor the voltage during transfers to ensure stable and efficient data communication. Capacity View: When powered on without connecting to a USB device, the tester displays the last accumulated capacity, thanks to its power-off memory function. This feature allows you to keep track of your devices charging history effortlessly. Alarm Function: For enhanced safety, the tester includes multiple alarm functions: over voltage, under voltage, over current, and short circuit alarms. These features ensure a safe and reliable charging experience, protecting your devices from potential damage. Optimize your charging setup with our Dual USB Voltage and Current Tester. With its intelligent features, broad compatibility, and safety alarms, this tester is a must-have for anyone looking to maintain the health and efficiency of their USB-powered devices.