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UM25C USB Type- C Voltmeter Ammeter Tester is communication version by Bluetooth connection. It can measure cable resistance,voltage, current, power, temperature and other values and display on the 1.44" color LCD screen.

Bluetooth Connection

Support Android APP and PC software control. 

1.44 Inch Color LCD Display

Makes it easy and clear to read data.

Adjustable Multi-angle View

More intelligent and convenient.

USB 2.0 Type-C Interface

4 direction rotation color screen, 6 levels screen brightness adjustment & 6 measurement display interface.

Multiple Functions

Voltage/current/power/capacity/energy detection, quick charge recognition, data storage, etc.

Wide Applications

Can be used to test power bank, charger, discharge load, tablet, mobile phone, etc.


Brand RD
Model UM25C
Display Screen 1.44 inch Color LCD Display
Voltage Measurement Range 4.000-24.000V
Voltage Measurement Resolution 0.001V
Voltage Measurement Accuracy ±(0.5‰ + 2 digit)
Current Measurement Range 0-5.0000A
Current Measurement Resolution 0.0001A
Current Measurement Accuracy ±(1‰ + 4 digit)
Capacity Accumulation Range 0-99999mAh
Energy Accumulation Range 0-99999mWh
Time Measurement Range 0-99h 59min 59s
Load Impedance Range 0.8-9999.9ohm
Temperature Measurement Range -10’C~100’C/0’F~200’F
Temperature Measurement Error ±3’C/±6’F
Screen Brightness Setting 0-5 Level
Auto Screen Off Time 0-9mins
Voltage Graphing Range 0-24.00V
Current Graphing Range 0-5.0000A
Data Storage 10 Groups
Quick Charge Recognition Mode QC2.0, QC3.0, Apple 2.4A/2.1A/1A/0.5A, Android DCP, Samsung
Refresh Rate 2Hz
Product Weight 24g
Product Size 71.2 x 30.5 x 12.4 mm
Package Contents 1 x RD UM25C USB Tester

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