Based around the H6 design the U-24 and the U-44 offer two different size of audio interface both of which can either run on your Mac or PC and your iPad.
Both the U-24 and the U44 can be battery powered.
The U-44 has a lot more connectivity than the U-24; Spdif, ADAT Light pipe i/o and also a the ability to attach the Zoom interchangeable microphone capsules directly to the interface.
Both will be available around the summer, however pricing is still yet to be officially announced!