ITEM NAME:USB Digital Power Meter Tester Multimeter Current & Voltage Monitor 3.5V-7V Description: - Name: USB Current Voltage Detector - Display mode: alternating current and voltage display - Voltage measurement range: 3.5V-7V - Current measurement range: 0-3A - Working current: 20mA - Suitable for USB Devices Package Included: 1x USB Digital Power Meter Tester.Suitable for USB Devices. - Working current: 20mA.