This is a Spare Plantronics USB Charger for use with models: Savi W440, Savi W440-M, Savi W740, and the Savi W740-M.
What it has to offer:
- Can be use for travel
- Charges battery without the headset
- Magnetic, so the battery is held securely
- This charger is included with the Plantronics W440 & W740 You can replace the battery mid-call, without losing the call, as long as a charged battery is reattached within 5 minutes. This allows for unlimited talk time.