Designed for multiple user environments, the ZUM Pro DECT 6.0 Headset allows wireless telephone conversations without the limitations of Bluetooth. Unlike Bluetooth, this headset operates on the secure DECT 6.0 Protocol. The range is up to 1300' (400m), as opposed to Bluetooth's 30'. The number of users is practically unlimited. Headset also offers a comfortable design with noise cancellation, VoIP/USB connection, Mac or PC compatibility and the ability to be able to walk away from the phone while continuing the conversation. Phone calls can be answered and ended remotely. Conference call with up to three callers. The base unit recharges the headset and will work up to 6.5 hours on one charge. Rechargeable Li Ion battery is hot-swappable and can recharge in the base station even while a call is in process. The Remote Handset Lifter is not included.