The band is provided with a first band member and a second band member attached to an instrument main body, and a linking member. Information is output as a function of the load factors which act objectively on the driver, driver activities and driver-specific driver characteristics which influence the driving of the vehicle. The machine may include a plurality of hardware devices which are accessible through the fascia. Each wavelength component is split into a wavelength component first portion on the first optical path and a wavelength component second portion on the second optical path.