The ECD-200BT-1 allows for you to use a mechanical-cable speedometer to be used in conjunction with a modern drivetrain which provides only an electronic output. 6” cable available for GM thread-on, GM clip-on and Ford clip-on style speedometers. Powerful motor is quiet enough to mount the module inside the cabin. Waterproofed case can also be mounted under the hood, or even inside a fenderwell. Bluetooth-enabled to sync with available mobile app for stone-simple set up. Supplied programming switch and LED readout make setup easy.