AboveTEK USB Power Meter Voltage Tester Current Monitor - USB 2.0 3.0 Volt Amp Reader Multimeter LED Screen-Portable Durable mV mA Measurement - Solar Panel Voltmeter Battery Power Bank Ampmeter Wall Charger Smartphone Tablet Gadget Charging Status Connects to any USB socket and show the current and voltage in LED screen with accurate real time Support 0A - 3A / 3V - 6V range with accuracy of 0.01A and 0.01V Extremely Portable and small lightweight size for easy carry Very low resistance for more accurate results Best for Solar panels and power banks to measure the maximum charging current