General description The USB Tester Multimeter is a versatile 2-in-1 device designed to measure current and voltage in USB and USB-C connections. It features overvoltage, overcurrent, undervoltage, and low power protections, ensuring the safety of your devices while providing accurate readings. The tester can check battery capacity, charging speed, and the quality of charging cables, making it an essential tool for anyone using USB-powered devices. Technical specifications Measurement range: 3.3-30V Current measurement range: 0-5.1A Input voltage: 12V Output voltage: 12V Voltage measurement error: 0.05 Ambient temperature: 37℃ Usage Displays maximum current of wireless chargers Tests capacity and power of mobile power supplies Monitors device data such as voltage, current, capacity, power, and load impedance Supports OTG function for enhanced compatibility Other information High-definition color LCD screen with switchable display modes Automatic data backup function after power failure