Several States in the US have laws requiring that drivers use hands-free systems in order to use mobile phones while operating vehicles. Unexpectedly, lots of companies who make Bluetooth headsets have been profiting from these laws, but now a bevy of Bluetooth speakerphone systems have started hitting the streets. SonyEricsson has jumped into this market with their sweet new AB900. Its a slick little device. Not only does it support standard speakerphone operations through its built-in speaker, but it also supports A2DP and can pass that stereo data through to your car stereo. When a call comes in, it pauses the music and lets you take the call. When the call ends, the music starts up again. Now, it seems to require a music-oriented handset, like SonyEricsson’s Walkman line, but it will likely work with Apple’s iPhone, as well. While there’s no pricing details just yet, the older HCB-150 device recently dropped US$50 to US$149, so I’m betting we can expect a tag of US$199. The SonyEricsson AB900 should hit store shelves in a couple more months.

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