After charging the MBW-100 for a couple of hours -- Sony Ericsson bundles a charger which clips onto the side of the watch -- it's ready to be paired with your phone. Enter the password "0000" and you're ready to go.
Unfortunately we couldn't get Nokia, BlackBerry or Motorola phones we had in for review to pair.
When a text is received the watch vibrates for three short bursts and a mail icon appears on the OLED display under the watch face. Only the first message alert will come through to the phone -- if you've already got an unread message the watch does nothing.
Similarly, the watch vibrates for the duration that an incoming call rings. To stop the vibration, you can choose to reject the call or answer your phone.
Sony Ericsson claims the MBW-100 is waterproof to 30 metres. We weren't game to take a mobile phone down to those depths but the watch remained connected to our phone and vibrated when messages came in when we placed the watch in a jug of water.
The MBW-100 is an interesting concept, but it's still quite gimmicky and limited in function in its current form. If you add theto the equation, though, being able to control the music on your home stereo from your watch (up to 20 metres away) is kind of geeky and cool.
Sony Ericsson provides a standard one-year warranty with the MBW-100 Bluetooth Watch.