Motorola's compact Motopure H15 Bluetooth headset has a flip microphone, ignores background noise, and responds reliably to voice-activated dialing.
The $130 Motorola Motopure H15 is the only bluetooth headset I've tested with a folding microphone design. To talk or turn on the headset, you flip open the boom, which then sits on your cheek (a bit like a mini-clamshell mechanism); closing the boom conserves battery life.
The H15 is just a tad smaller than a chubby thumb. It's light and compact, but getting the fit right took a little while. Motorola provides various cushions to place over the earbud, and I settled on the smallest oval-shaped one available, which helped anchor the headset in my ear canal. Even though the headset did not feel 100 percent secure or comfortable, owing to my small ears, it sat unobtrusively on my cheek.