RD UM25 USB 2.0 TypeC LCD Voltmeter Ammeter Battery Charge USB Tester precision measurement: The RD UM25 provides precise voltage and current readings, enabling accurate monitoring of your devices. APP communication: APP connectivity allows data tracking and management on your smartphone, improving ease of use and recordkeeping. Versatile compatibility: Compatible with a wide range of devices, making it a practical choice for monitoring battery charge levels. Clear LCD display: A LCD display shows voltage and current at a glance, with good readability in low light conditions. Reliable USBC/USB 2.0 testing: The unit supports USB 2.0 TypeC interfaces, enabling measurement across common USB charging scenarios. Use scenarios: Check charger output and cable performance by inserting the RD UM25 between charger and device to monitor realtime voltage and current. Test power banks and battery packs while they are charging to verify performance and safety. Monitor the charging of Liion battery projects or devices to ensure proper charging conditions.