Can easily measure the operating current of the output voltage of the USB port and equipment . smallsize , no power , and other ancillary equipment, plug and play also detect USB charger output voltage and current are standard suitable for factories, Laboratory and users. The tester uses a new generation of power four semi double loop integral converter IC , with a precision bandgap reference , range accuracy , high precision , stable and reliable performance , strong antiinterference ability , high temperature can be used for measuring USB powered or power consumption of the interface , mobile phone charger , U disk and other products. 1, USB powered devices can be used to measure air , voltage loads , USB terminal equipment working voltage and current . 2, The current and voltage cycle , easy to use and practical. 3, Compact and easy to carry , no additional power supply Technical indicators: Scope of work: Current (05A) can detect mobile phone charger voltage compliance DC5V Operating Range : U = 3 ;7.5V I = 0 ;5A Resolution : Voltage 10mV current 1mA Error : voltage 1% current 2% Full scale drop : ( When measuring current ) 200mV Package Included: 1pcs* Dual USB Current Voltage Charger Detector