This innovative product works with all Intellitronix or any other manufacturer's speedometer that accepts an industry standard 4000, 8000 or 16000 pulses per mile or works with any programmable speedometer. Unit comes complete with GPS receiver, omni-directional antenna and microprocessor that continuously converts GPS signals into a pulse stream that replicates the output from your mechanical speed sensor but with GPS accuracy. No more inaccurate speedo readings due to different tire sizes, rear end gear ratios, etc. Simple 3 wire hook up, power, ground and speedo out! Lifetime guarantee!