The Power Meter i-D is a unique monitoring tool that measure Power & Speed with the ability to display both standard and metric measurements. Power output can be displayed in HP, PS and KW. Speed can be displayed in mph and km/h. Both Power and Speed can be displayed in digital meter and graphical form. The Power Meter i-D feature a chassis Dynamo function, which plots Power to Speed in a graph form. Power Meter i-D and SBC i-D INFARED connection: These two units are connected via INFARED. Information is transferred directly without the use of extra wires. When connected, the SBC i-D has the ability to operate the Speed Map function and also display OPT1 and OPT2 readings. The SBC i-D can record and replay any information on the Power Meter i-D. Key Features: Compact 1/2 din size Chassis dynamometer (up to 1183hp) Reads speed in mph or km/h (up to 249 mph or 399kph) User adjustable brightness and contrast Easy to read illumi-drive (i-D) white lighting Easy 3 wire hook up