Tapio is a compact adaptive switch interface. It is a native USB device that can be connected to an Apple iOS device. It accepts industry standard 3.5 mm stereo or mono plugs and directly interfaces up to two adaptive switches to an Apple iOS Device or computer. Tapio is powered from the device and does not require external power. Tapio uses standard USB Human Interface Device (HID) drivers and works with iOS Devices, Windows, Macintosh and Linux computers, and many Alternative and Augmentative Communication (AAC) devices.