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This weekly roundup takes a look at the practical and sometimes quirky aspects of tech products. Pick up and talk A phone rings. Is it your work cell or your home cell? With Nokia's J Headset, it doesn't matter. The Bluetooth headset can be paired with two different phones at the same time. When a call comes in, there's no need to scramble for the right phone. Simply remove the headset from its clip and start talking. Made from stainless steel and shaped like the letter "J", the headset has automatic volume controls that adjust the volume up or down, depending on the surrounding noise levels. The headset can deliver up to five hours of continuous talk time. It costs about $100. www.nokiausa.com Dual-purpose camera gets serious Serious photographers often scoff at do-it-all cameras that promise to capture both photos and video. Too often, something has to give. JVC is working to change that perception with the debut of the GC-PX10 hybrid camera. Aimed at consumers who want...