RD UM25 USB 2.0 Type-C LCD Voltmeter Ammeter Battery Charge USB Tester - High precision measurement: The RD UM25 provides precise voltage and current readings for accurate monitoring of your devices. This enables real time observation of charging performance and battery status. - App communication: With APP communication, the RD UM25 allows easy data tracking and management on your smartphone, enabling convenient logging and remote monitoring of measurements. - Versatile compatibility: This USB tester is compatible with a wide range of devices, making it suitable for monitoring battery charge levels across different chargers, power banks, cables, and USB powered equipment. - Clear LCD display: Featuring a high quality LCD display, the RD UM25 makes voltage and current measurements easy to read at a glance, even in low light conditions. - USB 2.0 Type-C interface: Designed to work with USB Type-C connections and standard USB ports, offering broad compatibility with modern devices. Use scenarios - Check charging performance of a USB power bank or battery pack while a device is charging to verify current delivery and stability. - Verify output from USB wall chargers or power adapters to ensure voltage and current meet expectations. - Monitor power consumption for electronics projects or USB powered devices over time to optimize charging habits and performance.