Xcessor USB Charger Doctor. Power Meter - Voltage Tester - Current Monitor for USB 2.0, 3.0. Volt and Amp Reader. Can be Used to Check Mains Charger and Other USB Equipment. DC 3.5 - 10V, 0 - 3A. Blue / Semitransparent Portable, compact, light and easy to use USB input and output detector to gauge voltages and amperage on all the USB ports, chargers, cable and cords. Also easy to measure out no-load voltage. Shows one value at the time, switches automatically after few seconds. The charger doctor plugs in between your USB host and USB guest and will show output voltage and power draw (amps) in red LED display. Suitable for factories, laboratories and personal use. This is high quality product distributed only by Accessory Department. Accessory Department is the owner of all intellectual property rights in this listing and in the material published on it. Xcessor (TM) is trademark of Accessory Department. It is protected by corresponding copyright laws and treaties. All rights are reserved.