The Germany company Navilock has released the BT-451, a Bluetooth 2.0 mouse with the unusual element of a GPS receiver. The mouse pairs with phones and computers, and once connected, supplies location data to devices that are otherwise merely GPS-ready. To ensure that both the mouse and the device retain power, however, the 451 will only retrieve GPS data when it is immediately necessary. Navilock claims that the receiver used is strong enough to provide accurate tracking indoors as well as outdoors. The 451 should currently be on sale throughout Europe for ?79 ($108).