Feature: 1.The tester uses a new generation of power four and a half double integral cycle conversion IC, with a precision bandgap reference, range accuracy, high precision, stable and reliable performance, strong anti-interference ability, high temperature can be used for measuring USB powered or power consumption of an interface, cell phone chargers, U disk and other products. 2.It can be used to measure the empty USB-powered devices, voltage loads, USB terminal equipment working voltage and current. 3.Current and voltage cycle, easy to use and practical. 4.Compact and easy to carry, no additional power supply. Specification: Scope of work: Current (0-2.5A) can detect standard mobile phone charger voltage DC5V Operating Range: U = 3 ~ 7.5V I = 0 ~ 2.5A Resolution: Voltage 10mV Current 10mA Error: voltage <± 1% // current <± 2% Full scale drop: (when measuring current) 200mV Working temperature: 0-60 Celsius Product size: 52*20*15mm Include: 1 x USB Tester