 Apple offers several iPad accessories , most of which are adapters for the proprietary 30 @-@ pin dock connector , the iPad 's only port besides the headphone jack . A dock holds the iPad upright at an angle , and has a dock connector and audio line @-@ out port . Each generation of iPad requires a corresponding dock . A dock that included a physical keyboard was only supported for the original iPad , but all generations are compatible with Bluetooth keyboards that also work with Macs and PCs . The iPad can be charged with a 10 W standalone power adapter , which is also compatible with iPods and iPhones . 
