Voltmeter to USB OTG Phone Voltage Tester-40 - 40V DC Record Data File VoltOTG 28TC USB Voltage Meter OTG Interface USB Phone Tester Voltmeter-40 - 40V DC Date Save File Voltmeter FunctionPhone USB Voltage Tester Meter OTG Interface Voltmeter-40 - 40V DC Data Record Function Voltmeter Description: , Features:This is a DC VoltmeterThis is a mobile phone voltage meter, which is based on USB OTG interface, with the matched adapter, it can also be connected to the USB port of the computer. The VoltOTG to USB probe is not isolated, so high voltage measurement is not recommended. Matching mobile phone software can see the waveform of the measured signal, with stored data and other functions Portable and easy to carry Specification:Material: Plastic Size: Approx. 20x17x2cm/7.87x6.69x0.79inchMeasurement Range: -40 - +40VVad Conversion Rate: 15 - 240SPS USB Communication: 115200BPS, You can mention them: 1% Note:The mobile phone must support OTG function with OTG function, then it can be used Software Download Link: