The Plantronics Blackwire 720 ($149.95 direct) is a deluxe wired stereo headset for use with VoIP clients that doubles as a Bluetooth headset for cell phones. It's a good choice for outfitting desk-bound employees in a call center-one of Plantronics' original target markets, incidentally, before the...

Very comfortable; Stellar sound quality for voice calls; Separate PC and cell phone call answer buttons

Slightly thin-sounding transmissions through the microphone; Can only detach half of the wire when using as a Bluetooth headset

I'm always impressed by Plantronics headphone offerings. Time and again they are able to combine excellent functionality with comfort; they even mix in a bit of style in the process. The Plantronics Voyager Legend is an amazing headset, and you can read our review here .

Well-built; Comes with a good carrying case; Microphone boom flexible enough to stay tapped to the shape you want for best comfort and accuracy; Works as a wired USB headset or as a Bluetooth headset; Gets decent battery life; Comfortable

When using this headset as a Bluetooth headset you still have a relatively significant length of cable that ends with the controller; Some may find this to be a bit awkward although the built-in clip can help.

Great sound quality, needs a little more padding on the underside of the top.

I have a bad shoulder. Lengthy cell calls can be cheap but painful. Another problem with regular Bluetooth devices was the people would have a problem hearing me. The C720 Headset eliminates these problems.

Does everything that is listed.

I ordered the M version of the Blackwire because I do a lot of Skype (which is now a Microsoft product...). The difference between that version and non-M isn't clearly explained in Plantronics documentation. Anyway, was recognized properly on a PC, but not a Mac.

This headset works even better than I hoped. Bluetooth operation is seamless and sound quality excellent. Being able to answer a mobile phone call just by picking up the headset is fantastic and makes me wonder why I didn't buy one of these years ago.

This headset does not provide sidetone for Apple products (Mac and iPhone). Sidetone is the effect of the sound picked up by the microphone being instantly introduced at a low level into the headphones.

Descriptions of this set and other similar ones on NewEgg are woefully inadequate to make product comparisons.

Decent customer service from Plantronics

Headphone sound quality (esp. bass response is mediocre; the Bluetooth connection will only communicate to mobile phones, not my laptop

recommended for business use. Bluetooth feature is useful when alternating between using my mobile phone and headset for Voip calls