USB Voltage and Current Tester Detector 3.5V-7V 3A

The Vertical Transparent USB Voltage and Current Tester (commonly known as the USB Charger Doctor) is an indispensable diagnostic tool for makers, students, and hardware engineers. It allows you to easily measure the output voltage of any USB port and the operating current of connected USB devices in real-time. With its plug-and-play design, it requires no external power supply or batteries, drawing power directly from the USB port under test.

This compact tester is highly compatible with a wide range of USB-powered devices, including Arduino boards, Raspberry Pi, ESP32 development kits, smartphones, power banks, and custom USB hardware. It is perfect for troubleshooting power delivery issues, verifying charger ratings, testing USB cable quality, and monitoring current draw during prototyping. Its vertical, transparent casing provides a clear view of the internal circuitry while maintaining a slim profile that fits easily into tight spaces.

Features:

• Dual Monitoring: Alternates display between real-time voltage (V) and current (A) readings automatically.
• Plug-and-Play: No external power source or battery required; draws power directly from the USB port.
• Wide Compatibility: Works seamlessly with any standard USB Type-A port on computers, wall chargers, and power banks.
• Clear LED Display: Features a bright 4-digit LED display for easy reading even in low-light environments.
• Compact & Portable: Lightweight, vertical transparent design that fits easily in any tool kit or pocket.
• Essential Diagnostic Tool: Perfect for testing USB cable quality, charger output capacity, and microcontroller power consumption.

Package Includes:

1 x USB Voltage and Current Tester Detector (Vertical Transparent Model)