This Bluetooth Switch Interface (BSI) for iPad and tablets allows 1-2 switches to control 'switch-friendly' apps and some global aspects of an iPad. Switch-friendly apps are those written by developers in the Assistive Technology or AAC field, and are 'looking' for specific signals that my BSI transmits (space/enter). There are about 80 switch-friendly apps. A list can be found by clicking here.
The BSI has a rechargeable battery (charge via USB adapter, such as your iPad's and an included charging cable).