What is the difference between Wireless DECT & Bluetooth Headset?

The wireless dect headset needs to be connected to the dect base station which provides connection to the phone network. The bluetooth device can be connected to the devices directly such as mobile phone,desk phone, etc. If the user needs it only for desk or computer based phones, then dect headset will work and if the user needs it for mobile phones as well, then bluetooth headset is an option.