Ever wondered if your USB charger or cable is working right? This little USB tester—often called a 'charger doctor'—lets you see exactly what's going on. It plugs right into any USB port and shows you the voltage (3.5–7V range) and current (0–2.5A) on a clear LED display. Super handy for checking if your charger is outputting the proper 5V, testing cable quality, or seeing how much power your phone is actually drawing. It's compact, requires no extra power, and is totally plug-and-play. You get two testers in the pack (red and blue), so you can keep one in your bag and one at home. Great for techies, DIYers, or anyone who wants to avoid faulty chargers ruining their devices. Use it on power banks, car chargers, wall adapters, or even to measure the current of a USB-powered fan or light. A simple, affordable tool that gives you peace of mind.
