Description: 1.44 Inch color LCD display makes it easy and clear to read. Adjustable multi-angle view, more intelligent and convenient. Mini size and sandwich design structure, durable for use. Main functions: voltage/current/power/capacity/energy detection, quick charge recognition, data storage, etc. PC software support PC window (Win 7 and above) and phone android (android 5.0 and above, support 12 kinds language, chinese, english and Russia .... ) For Android APP: A: APP only support android 5.0 and above. B: Allow APP to do in the background, not be cleaned. C: allow APP self-starting. D: Allow APP stay after screen locked, not be cleaned. Specification: Display Screen: 1.44 Inch Color LCD Display Input Voltage: 04.50-24.00V Input Current: 0-3.000A Voltage Measurement Resolution: 0.01V Current Measurement Resolution: 0.001A Voltage Measurement Accuracy: (0.2%+1digit) Current Measurement Accuracy: (0.8%+3digit) Voltage Graphing Range:4.5V -24V Current Graphing Range: 0.00A-3.00A Date Store: 10 Groups Auto Screen Off Time: 0-9minutes Screen Brightness Setting: 0-5 level total 6 levels Quick Charge Recognition : QC2.0 QC3.o Load Impedance Range: 15-999.9 Temperature Range: -10-100 Material: Plastic + electronic components Size: 7.1 x 3 x 1.24cm/2.8 x 1.2 x 0.5inch Package Includes: 1 Piece USB Tester Note: UM24 is no communication version. This quick charge agreement recognition model is only for reference, because cell phone update quickly, it can't be absolutely accurate identification