For charging & powering all Apple devices in a vehicle that are supplied with power via a USB (Universal Serial Bus) socket Twin power with max 31 A power supply for simultaneous charging of two devices like iPad & iPhone Charging current of max 3100 m A for fast charging LED function indicator gives information about the device status 21 A port ideal for Apple iPad 10 A port ideal for iPod iPhone Also suitable for other USB (Universal Serial Bus) devices Suitable for the electrical system of cars (12V) connection via the cigarette lighter socket