CUP HOLDER CHARGER: Multi-function cup holder car charger, dual cigarette lighter hole, dual USB, real-time voltage monitoring, do not choose the car model, general wide voltage, suitable for many kinds of models , 12V-24V can be used. DUAL USB CAR CHARGER: No need to wait, the dual USB interface can charge two mobile phones at the same time, this cup type cigarette lighter is applicable to all vehicles with cup holder. 3.1A: Intelligent large current 3.1A, intelligent fast charging technology with 3.1A current to quickly improve mobile phone charging speed. FUNCTION: Intelligent identification matching current, connect to the device via USB port, intelligent recognition and matching mobile phone current for fast charging. LED VOLTAGE DISPLAY: Real-time voltage monitoring, automatic protection. tick against current overload, intelligent LED screen real-time display at a glance.