Generic Dual USB Charger Current Voltage Charging Detector Battery Tester Volt meter Ammeter 3-9V 0-3ASpecification:1.100%Brand New and High Quality 2 Measuring range: DC 3V-9V 3 Current: 0-3A (error: + 1%) 4 C 3V-9V, Current: 0-3A (error: + 1%) Maximum support 5A current (beyond 3A error will be larger in 3%).5 this product can measure voltage USB power supply equipment, empty load, the voltage and current of USB terminal equipment at work 6 current, voltage display cycle, the use of simple convenient and practical. Application: Any mobile phone, any electronic product