Keyspan is demonstrating its soon-to-ship four-port adapter at Macworld Expo and
, San Francisco.

The "Keyspan USB 4-Port Serial Adapter" connects four serial devices to a single USB port with each port supporting data rates of up to 960 Kbps.

Keyspan claims its $149 serial adapter is half the price of other four-port offerings on the market. UK distributor AM Micro does not have UK pricing yet.

The product will be exhibited at Booth 3535, North Hall at the SanFrancisco Expo.

Macworld Expo San Francisco 2001 starts on Tuesday January 9. Macworld will, of course, be there in force to bring you all the news as it happens – from new Macs at Steve Jobs' keynote to product launches and industry announcements. Go to for all the latest developments.