Tick off its features: like several of the better headsets we’ve tested, the nX6000 uses the newer Bluetooth 2.0 wireless standard, which lets you talk on the phone for roughly 6 hours or stand by for 90 hours before a recharge; it also connects with the iPhone automatically and almost immediately after it’s turned on. Gennum also includes dual microphones and “Frontwave Extreme” digital audio processing, designed to cancel…
