Multi-function: Intelligent digital USB instrument can be used to test voltage, current, capacity, temperature, record charging status, etc. The LCD data is clear at a glance, and the 3C device you use is detected in real time to avoid accidents. Temporary storage of current capacity and electrical energy during power outages for reviewWhen the power is turned on again, the current capacity and energy will be accumulated. If accumulation is not required, it can be cleared manually.Button function: Click the button to view the charging data saved in groups 1-9; press and hold the button for 3 seconds to clear the charging data stored in the group; double-click the button to change the display page.COLOR: BlackU disk current detection: U disk usually works between 50-100MA. When it exceeds 100MA, the USB flash drive may be faulty. It is recommended to back up files and detect U disk. Escort 3C equipment: Insert the tester into the charger or mobile power supply and observe the voltage of the USB tester. If the output voltage exceeds the allowable charging voltage range of electronic products, please stop using the charger or mobile power supply.Material: ABSMeasuring voltage / current:1. Insert the USB male plug into the charger, into the mobile phone, etc.2. The device can directly read voltage and current parameters.The LCD displays current, voltage and battery capacity on the same screen: no professional wiring is required, and cumbersome operations are eliminated. As long as the USB port is plugged in, the charging status of the USB power supply can be detected in real time, and the indicator lights such as voltage, current, and capacity can be seen At a glance.Intelligent memory charging capacity: It can store the mAH power of 9 charging devices to save and check whether the charging device's tance is false.Save the phone's protective stickers:Real-time monitoring, say goodbye to more than one dayData measurementTemperature measurementPrecision measurementEnergy detectionProduct parameters:Voltage: DC4-30V / current: 0-5.1ACapacity range: 0-99999mAhPower range: 0-999999mWhTime range: 0-99hPower range: 0-150WResistance measurement range: 0-999.9Grouping: Group 1-9Internal temperature: 0-80 D positive voltage: 0-10V / negative voltage 0-10VQuick charging recognition mode: QC2.0, QC3.0Package Contents:1 * Digital display voltmeter mobile phone charging detectorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.