<p>This USB instrument can monitor voltage, current, capacitance, power, load resistance, D+\/D- voltage, load time and other data. It supports QC2.0 \/ QC3.0, BC1.2, Apple Iphone 2.4A and various other smart phones and chargers. Wide test range: 0-5.0A. Wide voltage range: 3-30V.This USB digital multimeter is specially designed to protect your mobile phone charging, the actual capacity of your power reserve and real-time charging data detection.Protect yourself and your devices with real-time monitoring real load data. The USB monitor is automatically cut off when the device is fully charged. Description:- This USB instrument can monitor voltage, current, capacity, power, load resistance, D+\/D- voltage, time charging and other data.- It supports QC2.0\/QC3.0, BC1.2, Apple Iphone 2.4A and various other smart phones and chargers.- Wide test range: 0-5.0A. Wide voltage range: 3-30V.- This USB digital multimeter is specially designed to protect your mobile phone charging, the actual capacity of your power reserve and detecting real-time charging data.- Protect yourself and your devices with monitoring real-time load data. The USB monitor is automatically turned off when the device is fully charged.- Exclusive design allows both USB sides to be used when connecting the USB tester to other devices.Specification:- Input\/output voltage: DC 3-30V, Resolution: 0.01V- Current test range: 0- 5.0A, accuracy 0.01A- Cumulative capacity range: 0- 99999 mAh, accuracy 0.001Ah- Cumulative energy range: 0- 999.999mWh, precision 0.001Wh- Power calculation range: 0 to 999.999 W, precision 0.001 W- Accumulated time range: 0- 999 hours 59min 59s, Accuracy: 1s- Internal resistance: 0-999.99 ohms- Timer: 0-24 hours- Temp. Range: 0-84- Accuracy: 1%- Line Loss: 0.1- Material: plastic- The color black- Size: approx. 53x 26mm \/ 2.09x 1.02inchPackage includes: 1 x USB Safety Tester</p> <p>Note: The data are all manual measurement, please allow 1-3cm error, due to the light difference and display, there will be some color difference, depending on the physical item received.</p>