Plantronics Discovery 640 Bluetooth Cell Phone Headset Review

Average Reviews:

(More customer reviews)I've been using this headset for over a month now. In the interest of full disclosure I should state I am a supplier to Plantronics (and other headset manufactures), but am NOT employed by Plantronics (or any headset manufacture). I was given a early production unit before they were generally available.
The Discovery 640 comes with much more than what is pictured here. The complete kit is quite impressive and includes:
The headset (shown)
Small, Med, and Large soft ear inserts (pic shows med insert)
Ear stabilizer loop (not shown in pic)
charging holster
AAA battery holder for charging off battery
cell phone charger adapters for using your cell phone charger (Nokia, Motorola, Sony, and ???)
wall transformer (if you don't want to use the cell phone charger)
All of this is supplied in a stylish metal case that measures about 6"x3"x1".
Pros:
The headset is very comfortable and surprisingly stable without the ear loop installed. After a few minutes you completely forget you are wearing a headset - it is that comfortable.
The sound quality is very good - as one would expect from a Plantronics headset.
While it is certainly the smallest most comfortable headset I have seen, it is the charging holster and AAA battery case that steals the show. With the AAA battery attached, the holster is about the size of a cigar tube or very fat pin. It has a clip for attaching to your shirt pocket or securing inside your purse. The holster provides the dual purpose of storing the headset when you don't want it in your ear, and providing boost charge (via the AAA battery). When done talking, simply drop the headset in the holster to store the headset and recharge the battery.
Oh, and the holster will vibrate if you receive a call while the headset is stored there! Removing the headset will answer the call.
Cons:
Talk time is short (claimed 5 hrs), but using the holster and AAA battery eliminates this problem (15hrs talk time). If I recharge the headset at night and use the AAA booster during the day I have no problem getting though the day - and the AAA battery lasts about a week.
Headset is so small and comfortable it would be easy to loose and not realize it. Of course using the ear stabilizing loop (or keeping it in the holster) would prevent this.
Conclusion:
If you want a small, stylish headset, this is the one! If you want lots of talk time and don't want to use the holster to refresh charge, get the Voyager 510.

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The Plantronics Discovery 640 Bluetooth Cell Phone Headset lets you stay connected like never before. This device features a sleek in-ear design and an innovative pocket charger that gives you up to 15 hours of talk time. The unit's charger is powered by a single AA battery. The Discovery 640 weighs in at only nine grams and it is stylish, comfortable, and convenient. Plantronics combines cutting-edge technology to set a new standard in Bluetooth wireless headsets.
What's in the Box Headset and pocket charger.

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