Review on 🔌 UM25C USB Tester - Voltage Current Bluetooth Battery Power Charger Voltmeter Ammeter Multimeter with 1.44 Inch Color LCD Display, USB 2.0 Type-C Cable, Resistance Load, and Impedance Meter by Matthew Oumer

Summary: I bought this to measure USB charging current, specifically I bought an ultrasonic dog bark device and the power LED kept flashing after a few hours so I guess that the battery charging process is finished. In the first picture, the charging current is 393.4 mA and after 30 minutes it has dropped to 70.4 mA, so charging is complete. Pros: Good fit and finish, easy-to-read display (compared to the smaller screen in the photo, details below). Cons: Bluetooth didn't connect (phone said it wasn't supported), but who in their right mind wants to connect a foreign device to their smartphone. At least there is an on/off switch for BT. =) Alternative product on the photo: Invtek USB Digital Power Meter Tester https://smile.amazon.com/gp/product/B083TD2BW5