Charger Doctor USB Voltmeter Ammeter Tester 3.5V-7V 3A - Curved Transparent

The Charger Doctor USB Voltmeter and Ammeter is a compact, plug-and-play diagnostic tool designed to measure the output voltage of USB ports and the current draw of connected USB devices. Operating within a range of 3.5V to 7.0V DC and up to 3A, this tester helps you easily monitor the performance of chargers, power banks, USB cables, and development boards like Arduino or Raspberry Pi. It solves the problem of debugging power issues, verifying fast-charging capabilities, and protecting sensitive electronics from overvoltage.

Perfect for makers, students, and hardware engineers, this USB tester is highly compatible with any standard USB-A port. Use it to test the efficiency of solar USB chargers, measure the power consumption of ESP32/ESP8266 IoT nodes, or troubleshoot faulty charging cables. Its curved, transparent casing provides a clear view of the internal circuitry while offering a robust, space-saving design that fits easily into tight USB port layouts.

Features:

• Dual Parameter Display: Alternates automatically between displaying voltage (V) and current (A) for real-time monitoring.
• Wide Measurement Range: Accurately measures voltage from 3.5V to 7.0V DC and current up to 3.0A.
• Plug-and-Play Operation: No external power supply or battery required; draws power directly from the USB port under test.
• Compact Curved Design: Features a side-entry USB male connector, making it ideal for crowded laptop ports or power strips.
• High Precision: Delivers reliable readings with a low error margin of ±1% for both voltage and current.
• Transparent Casing: Sleek, curved transparent shell protects the internal components while allowing full visual inspection.

Package Includes:

1 x Charger Doctor USB Voltmeter Ammeter Tester (Curved Transparent)