Compatible with all kinds of mobile phones and digital products with USB function. Charging for iPads， Smart Phones， PDAs， MP3s， MP4s， GPSs， PSPs， Bluetooth devices and tablet. With a precise IC protector to safely avoid over-charging， over-discharging and short circuit.. Intelligent single-chip computer controls the output power， providing steady voltage and high efficiency charging. When used to charge devices， it will not impede the operations of the devices in any way.