Features: FNB58 is a multifunctional testing instrument that can simultaneously measure current and voltage, providing comprehensive power information. Equipped with high-precised measurement functions, it can accurately display current and voltage values, meeting the needs of users for testing data. A 2.0-inch LCD high-definition display screen with clear and visible measurement data, pair with 5P high current USB-A, 24P full pin Type C input and output interfaces, charging detection, one step faster. 0.0001 low resolution, real-time monitoring of subtle changes in voltage, current, and power during charging.Support automatic protocols detection, such as PD3.0, QC3.0, etc multiple protocols. Supports recording of 10 sets of charging and discharging energy data, with built-in battery capacity calculation formula and surfaces drive installation; synchronize data, efficient and convenient. The device is compact and lightweight, with a simple interfaces operation and an independent function button, making it easy to carry and operate. Specifications: Material: Metal+Plastic Type: Black without Bluetooth-compatible in English, Blue with Bluetooth-compatible in English(optional) Size: Approx. 42x13x82mm/1.65x0.51x3.23inch Model Name: FNB58 USB Tester Moniting Voltage: Ranges: 4~28V Resolution: 0.00001V Accuracy: ±(0.2‰+2) Moniting Current: Ranges: 0~7A Resolution: 0.00001A Accuracy: ±(0.5‰+2) Moniting Power: Ranges: 0~140W Resolution: 0.00001W Accuracy: ±(0.5?+2) Load Equivalent Internal Resistance: Ranges: 0~9999.9Ω Resolution: 0.0001Ω Accuracy: ±(0.5‰+2) D+/D- Voltage: Ranges: 0~3.3V Resolution: 0.001V Accuracy: ±(1.0%+2) Capacity: Ranges: 0~9999.99Ah Resolution: 0.00001Ah Energy Used: Ranges: 0~9999.99Wh Resolution: 0.00001Wh Cable Resistance: Ranges: 0~9999.9Ω Resolution: 0.0001Ω Package Includes: 1 Piece FNB58 USB Voltage Current Tester note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.