Features:1. It has a 0.91 inch OLED screen.2. It's so lightweight, it's so portable you can take it with you.3. Environmental protection and low energy consumption.4. Over and under voltage reminder for safe use.5. An excellent tool that is useful, helpful and so practical. Easy to use and handle at affordable prices. Description:This is a mini USB meter. It can measure voltage, current, power and capacitance. Specifications:Working range: current (0-2.5A) detects whether the voltage of the mobile phone charger can reach DC5V standardWorking range: U=3 - 7.5V I=0 - 2.5A Resolution: 10mV voltage, 10mA current: lt;± 1% lt;± 2% Voltage drop: 200mV (when measuring current)Working temperature: 0-60°C Product size: 53*35*14mmPackage included:1 * USB current voltage Capacitance testerNotes:1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.