IR (and a USB dongle). If the price of entry was too high on Sony's Bluetooth remote, you can spend a little less on the BluWave and use the leftover cash on the company's other announcement -- its PS3 controller charger. The now-shipping $40 base can juice up to four pads at a time and gets its power in another nice, old-fashioned way -- your wall outlets.
Nyko announces BluWave PS3 remote, ships charging station
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