Although this actually a three-port USB hub instead of a four-port one (one’s used to provide power), we’ll forgive the mislabeling since it also functions as a Bluetooth 1.2 dongle. Instead of having to spend $19 on a Bluetooth dongle to connect your cell phone or Bluetooth headset, just grab one of these at the same price. Consider the hub as a bonus.

USB Bluetooth Hub [Brando via i4u]