Wireless headsets:-

Wireless headsets are quickly becoming a new trend for both business and consumer communications. There are a number of solutions for wireless, and they usually differ according to application and power-managementDECT wireless headseDECT (Digital Enhanced Cordless Telecommunication] is one the most common standards for cordless telephones. It uses 1.88 to 1.90 GHz RF (European Version) or 1.92 to 1.93 GHz RF (US Version), as the frequency bandwidth. Different countries have regulations for the bandwidth used in DECT, but most have pre-set this band for wireless audio transmission. The most common profile of DECT is GAP


(Generic Access Profile), which is used to ensure common communication between base station and its cordless handset. This common platform allows communication between the two devices even if they are from different manufacturers. For example, a Panasonic DECT base-station theoretically can connect to a Siemens DECT Handset. Based on this profile, developers such as Plantronics or Jabra have launched wireless headsets which can directly pair with any GAP-enable DECT telephones. So users with a DECT Wireless Headset can pair it with their home DECT phones and enjoy wireless communication.
Bluetooth wireless headsets:


Most users have heard about Bluetooth, and although this technology was designed originally for a much wider application, it has today become largely for voice transmission (a notable exception to this would be the use of Bluetooth in the Nintendo Wiimote). The reason for this general exclusivity is because of the power/range settings of Bluetooth. Bluetooth uses 2.4 GHz RF, similar to WLAN or Wi-Fi; however, by default it is set for a very close proximity usage for power consumption benefits. This deficiency for a longer-range coverage made Bluetooth technology un-desirable for data transmission. As nowadays, more and more mobile phones come equipped with Bluetooth, this technology has become a common wireless profile for wireless mobile phone headsets only.

When choosing a Bluetooth headset users should be aware that Bluetooth headsets come in different types as well. Standard Bluetooth headset's using version 1.0 or 1.1 are often a single-side monaural earpiece, which can only access the Headset/hands free profile of Bluetooth. Depending on the phone's operating system, this type of headset will either play music at a very low quality (because the phone is converting it into a voice signal) or will be unable to play music at all (because the phone cannot perform such a conversion). Users who need a stereo-music playing Bluetooth headset should look for a headset with the A2DP profile.[10] Users should note that some A2DP-equipped headsets will automatically de-activate the microphone function during music-listening, so if these headsets are paired to a computer via Bluetooth connection, the headset may either disable the stereo function or the microphone function.