Weve seen plenty of Bluetooth hardware with dual modes, dual channels, dual mics and even dual sub-woofers, but dual device connectivity? Thats a little less common. Its a feature on the new Tracks Air headset from Motorola and SOL Republic, and it means you can listen to music or a movie on your tablet while still being able to receive a call from your mobile, rather than being forced to pair with just one or the other.