TeleNav added the TeleNav Asset Tracker to its Mobile Resource Management product line. The device is a battery powered GPS tracker that can be placed on vehicles, trailers, tractors or heavy equipment to monitor their locations. Users log into a password-protected Web site and view the exact position of all mobile assets, according to the company. The product also can be customized to send an alert as soon as an asset moves from its current location. The device costs $199.99 in addition to a $19.99 per month charge for the Web-based tracking interface.