Bluetooth is designed to be low cost, eventually under $10/unit. On the flip side, however, are the limited connection distance and, even more damaging, the transmission speeds. Bluetooth supports only 780 kb/s, which may be used for 721 kb/s unidirectional data transfer (57.6 kb/s return direction) or up to 432.6 kb/s symmetric data transfer. These rates are comparable to the 1–2 Mb/s supported by HomeRF and, although live digital video is still beyond the capability of any RF technology, perfectly adequate for file transfer and printing applications.