Bluetooth is an excellent way to share data from a PC and make wirefree handsets work for mobile phone, and these can often be connected to a PC using the regular Bluetooth connection that is built into most modern laptops. For desktop computers a Bluetooth dongle can be used that plugs into a spare USB port. An old USB1 port is sufficient for this because the speed at which data is transferred is slow, 1-3 MBps. However, regular Bluetooth is not fast enough for quality stereo sound.

Headphone Adapter or Digital A2DP Dongle?

A new version of Bluetooth allows for clear, interference-free streaming of stereo audio to the headphones. The clarity is far superior to the hissy FM technology of the past, which came with issues of interference and noise on going out of range. There are none of the line of sight issues that afflict infrared headphones, and the power consumption is low - the headphones are usually rechargeable either via USB or a separate charger. As the receiver goes out of range (typically 10-30m) the sound is impaired with small interruptions, and then mutes, rather than the deafening hiss FM or infrared systems often produce out of range)

The data rate for regular Bluetooth is not enough for reliable streaming of stereo audio, so Bluetooth headphones require either a special Bluetooth dongle that supports something called A2DP (Advanced Audio Distribution Profile), or they come with a device to plug into a regular 3.5mm headphone socket. Which is right for depends on what the headphones will be used for.

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