About the instructions and methods of PD3.0 trigger DC5.5/USB3.0/Type-C HD Color Screen 6-Bit High Precision Display UD18 Bluetooth Digital Meter- This is a new product! Color screen! Bluetooth! 8 interfaces! Support USB, Type-C, DC5.5, micro USB. It can measure the voltage and current changes during the operation/charging process of various DC inverters such as mobile phones, notebooks, desk lamps, routers, set-top boxes, etc., and can be analyzed by Bluetooth on the mobile phone! Settings: Remote setting parameters (Please press the button to observe the setting parameters of the UD18 host will flash, press this button multiple times to cycle the parameter setting) +/- : Remote host interface switching and value addition and subtraction adjustment keys Confirm: remote host screen flip and setting parameter confirmation and value clear key button! 6-Digit High-Precision Measurement Display uses professional instrument sampling circuit, voltage and current power measurement accuracy reaches 0.00001 DC5525 & DC5521 Product Measurement Through the UD18 tester, you can test notebooks, car emergency power supplies, routers and other DC products, real-time monitoring of current, voltage, power, capacity, power and other state of charge! Wireless Bluetooth Data Measurement Through the Bluetooth function of the mobile phone, the APP Bluetooth pairing can be realized, and the charging status, current, voltage, power, graph and other measurement data can be viewed in real time. Multi-function interface test This device can test a variety of USB and Type-C, DC power and other digital products Multi-screen measurement interface By pressing the button, switch different measurement interfaces, test current, voltage, power, timing, capacity, power, temperature and other data tests, and can set full power off, timing charging, over current protection, over voltage protection, low voltage protection and other functions. , fully protect your charging products screen 360° rotation Four-sided rotary screen 360° can read measurement data at any angle can test temperature (not includ temperature probe) The UD18 tester can be connected to an external temperature sensor, which can measure different temperatures (Note: This product does not include a temperature sensor, can be purchased separately) Two-way current design This innovative test, whether it is forward current or reverse current, can be tested. Precision Analysis UD18 tester is calibrated by large equipment, voltage and current accuracy comparison