Check the listing for details. Optimus GPS Tracker Optimus OBD w/ Extension Cable, Model OBD w/ Extension Cable. Condition: New. Listed at 4.99 USD. The Optimus GPS Tracker Optimus OBD with Extension Cable is a reliable tracking device designed for vehicles. With the trusted brand of Optimus and the model specifically designed with an extension cable, this GPS tracker offers accurate and efficient location tracking for your vehicle. Perfect for those looking to monitor their vehicle's location and ensure safety and security.