- Comprehensive Detection: This USB tester measures voltage (4-30V), current (0-3A), and capacity (0-99999mAh), allowing you to monitor the performance of your electronic devices effectively. - Compact and Portable Design: Lightweight and easy to carry, this multifunctional tester is perfect for on-the-go use with various electronic devices, whether at home or while traveling. - Versatile Compatibility: Ideal for checking the voltage, current, and battery capacity of a wide range of USB-powered devices, making it indispensable for both professionals and everyday users. - User Protection Features: Equipped with reverse connection protection to prevent damage from incorrect usage, along with an automatic shut-off function that saves data every minute for your convenience. Use Scenarios: 1. Charging Diagnostics: Use the tester to evaluate the charging efficiency of your smartphone or tablet, ensuring you are using the right charger for optimal performance. 2. Battery Health Monitoring: Regularly check the capacity of power banks to prevent unexpected shutdowns during your travels or outdoor activities. 3. Device Compatibility Checks: Test various USB cables and adapters to ensure they meet required specifications before use, aiding in troubleshooting connectivity issues. With its robust features and practical applications, this USB tester is a reliable tool for anyone looking to maintain and optimize their electronic devices.