This is the AC Charger and Extra Battery for the Plantronics CS540-XD or CS545-XD wireless headset system.
This part comes with the CS545-XD package (not included in CS540-XD)
Not compatible with other Plantronics CS500 models
charging cable not included
note: 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.