To charge the Discovery 640, you insert the headset into the unique, pen-size carrying case and attach the bundled compact wall charger to the bottom. Unlike other headsets, you are not restricted use just the Plantronics charger - you can also attach a Nokia, Motorola, Sony Ericsson, or Siemens wall or car charger.

In addition, you can attach a module that contains a single AAA battery (see picture to the right). This let's you easily charge the battery when away - a single battery will charge the headset full two times.

The Discovery 640 offers up to 15 hours of talk time (and 70 hrs of standby time) when used with the AAA battery to charge the headset between calls. Without AAA battery, the headset offers up to 5 hours of talk time between charges.

• Long-wearing comfort and ultra-light—weighs only 1/3 ounce
• Personalized fit with three sizes of soft gel ear tips
• Optional ‘ear stabilizer’ fits over the ear
• Sleek, lightweight wireless design with chrome carrying case
• Pocket case vibrates with incoming calls