Charges 5 spare Savi headsets while your W440, W710, W720, W730, W740 wireless headset is in use
Stand alone bank of 5 headset chargers
Must also purchase charging cradles (sold separately)Great for 24/7 or 911 applications
W440, W740 Spare headset, W730 Spare headset ear loops and headband are all sold separately
Note: charging cradle included in the Savi spare headset
Also see Plantronics multi-shift information PDF for more information.