Bluetooth is a wireless technology that is very common in mobile phones and digital music players, usually as a means to wirelessly send music or voice calls from the device to a headset or earphones. In fact, many current cellphones no longer offer the auxiliary ports needed for wired connections, relying completely on Bluetooth for connection to external devices.
Bluetooth performs well over short ranges between 10 and 30 feet or so. It's ideal for sending small bundles of data between devices but wasn't designed for data-heavy applications such as video streaming.
So what is Bluetooth doing in a camcorder?