The EW1231 Quick USB Car Charger charges your smartphone on the go. The USB car charger can be used in both cars and trucks and needs to be plugged into the cigarette lighter. The EW1231 is equipped with a quick charge function for QC 3.0 supported devices. This function charges the supported devices 4x faster, 0-80% in only 35 minutes. The charging will stop automatically when the device is fully charged. The EW1231 is equipped with over temperature protection, over voltage protection, over current protection and short circuit protection.