Designed for multiple-user environments, the ZUM DECT 6.0 Headset allows wireless telephone conversations without the limitations of Bluetooth to give you flexibility and freedom you never had before. Unlike Bluetooth, the ZUM DECT 6.0 Headset operates on the secure DECT 6.0 Protocol. The range is up to 500, as opposed to Bluetooth's 30'. The number of users is practically unlimited, compared with the 55 user maximum limit of Bluetooth. Take advantage of the comfortable headset with noise-cancellation and the ability to be able to walk away from the phone while continuing the conversation. The Base Unit recharges the headset and will work up to 7 hours on one charge. Remote Handset Lifter RHL-2010 is sold separately and allows you answer and hang up even if you're not near the phone.