This multifunctional tester can detect the charging state of the electric appliance in real time, and the indicators such as voltage, current and power are clear at a glance. Features: Powerful Function: This tester is a high-reliability, high-safety USB voltage andcurrent detection meter. It can be used to measure charging voltage, current, power, power WH, mAH, charging time, temperature and other information. Color LCD Display: Adopts a 12800 pixels IPS color LCD display with high brightness and long service life. With screen flip function, let you see from any angle to appreciate the color bright, exquisite and natural display picture. Easy to read. Optimize Operational Logic: Short Press key button to switch screen; Long press key button the screen to flip; Quickly double-click key button the power Wh to clear zero; Fast three-click capacity mAH to clear zero; Fast four-click time to clear zero. Widely used: the tester is widely used in various digital equipment charging detection, various USB chargers detection, various charging treasures detection, various mobile hard disk detection, supporting mobile phone super fast charging detection and computer USB interface application detection. It is the first choice for digital players and electronic enthusiasts. Small And Portable: Exquisite and compact, convenient to carry, made of high quality material, durable, dust-proof and fall-proof, more beautiful. Specifications: Color: Black / Transparent Blue / Transparent (Optional) Voltage Measuring Range: 3.30V ~ 30.0V; Resolution Precision: 0.01V Current Measuring Range: 0.00A ~ 5.10A; Resolution Precision: 0.01A Cumulative Capacity Range : 0 ~ 999999 mAH; Resolution Precision: 0.001Ah Power Cumulative Range: 0 ~ 999999 mWH; Resolution Precision: 0.001Wh Power Metering Range: 0 ~ 150 W; Resolution Precision: 0.01 W Load Impedance: 1~ 999.9 ohm; Resolution Precision: 0.1 ohm Temperature: 0~ + 80 ; Resolution precision: 1 Timing Maximum Time: 999 H 59 M 59 S; Resolution Precision: 1 S Input/Output Interface: USB D+ Voltage: 0V ~ 2.99V; Resolution Precision: 0.001V D- Voltage: 0V ~ 2.99V; Resolution Precision: 0.001V Time to Refresh: > 500 ms/time Measurement Rate: 0.5 times/s Display Screen Type: IPS true color digital LCD display screen with a heavy cost of 12800 pixels Screen Resolution: 160 * 80 Self-Consumption Current: < 0.02A Working Temperature: - 10 ~ + 60 Working Humidity: 10 ~ 80%RH (no doubt) Working Pressure: 80 ~ 106 kpa Material: ABS Item Size: 6.7 * 2.4 * 1.4 cm / 2.64 * 0.94 * 0.55 inch Item Weight: 19g / 0.67oz Package Size: 8 * 3 * 2 cm / 3.15 * 1.18 * 0.79 inch Package Weight: 28g / 0.99oz Package List: 1 * Digital USB Voltmeter Tester