3 Ports USB Hub Charger for iPhone 4G iPad 1/2 iPod White Adds 3 USB 2.0 hi-speed ports. Supports up to 480 Mbps transfer rate. Plug and play. Fully compatible with USB 2.0 specification, backwards compatible with USB 1.1. Provide up to 500mA per port. Powered by USB port. Have a DC 5V power adapter port, can provide extra power supply.