The Brantz Dual Sensor Switch allows you to connect two sensors to one trip meter. If you compete in long distance rallies then this switch is the perfect solution if you break a sensor. Instead of having to manually change the sensor itself, all you have to do is flick the switch to the second sensor. No time will be lost and you wont lose any of your previous recorded measurements.Connect two sensors to one trip meterChange sensors with a flick of a switchYou can also have a specific terrain sensor as your second sensor. So if the terrain changes in the middle of the rally, you can switch your sensor to one which is more appropriate.