Discover the ultimate tool for monitoring and testing your USB devices with our 4V-30V 0-3A Mini USB Voltage Current Monitor Tester. This compact and efficient device is designed to provide precise measurements and enhance your understanding of your device's power usage. Simultaneous Display: Easily view voltage, current, and mAH data all at once on the clear LCD display. This feature allows for quick and convenient monitoring of your device's power status. Comprehensive Data Detection: Detect the mobile power output mAH with ease. The tester supports multi-group detection data storage and features a power-down save function, ensuring your data is preserved even when the device is turned off. Uninterrupted Data Transmission: Enjoy accurate readings without any interference in data transmission. The current parameters remain stable and do not bounce, providing reliable and consistent results. Dual Power Ports: Equipped with both USB male and Micro USB ports, this tester can assess the quality of your Micro USB lines. This dual power capability enhances the versatility and functionality of the device. High Precision and Low Loss: With a current sampling resistance of just 25 milliohms, the tester ensures minimal power loss. The precision current calibration function further enhances accuracy, making it an indispensable tool for precise measurements. Upgrade your power monitoring capabilities with our Mini USB Voltage Current Monitor Tester. Its advanced features and reliable performance make it an essential gadget for anyone looking to optimize their device's power efficiency.