RayVel Smart Dual USB Car Charger with car battery protection feature for iPhones, iPads, iPods, Samsung Smartphones and other USB powered devices (Black) Car Charger with LED screen (featuring volts and Amps) that shows car battery voltage to indicate the suitable condition for power up your USB charging devices. Integrated Smart Power circuit design with auto-detect technology that detects your Android and iOS devices automatically and delivers the fast charging (upto 2.4Amps each port). Comes with CE, FCC and ROHS certification and protect your devices from overcharging, over voltage, and short circuit. Screen starts blinking when the car battery voltage is below 12 V shows not appropriate time to plug your devices. 12 months warranty against all manufacturing defects and 24 X 7 hassle free customer support services.