Despite the small outer form, they are internally revised and offer even more functions than the standard 2.0 SIP speedometers. New features include a self-learning gear indicator and the Speed-Test and Power-Test applications, which are otherwise only found in the large speedometers for the Modern Vespas. This is a timer that can be used to measure either the time from 0 to a previously entered speed or the duration for covering a previously programmed distance. For example, information such as "from 0 to 100 km/h in e.g. 6 seconds" can be measured or "150 m in e.g. 5.3 seconds" etc....
The speedometers require 12 V power supply, which these vehicles only provide after conversion to PX, Vespatronic or SIP Performance ignition. Those who want to stick to their original 6V on-board electrics can still operate the instruments using an external battery. For this purpose, a charge level indicator is available in the tachometers, which reminds the user to recharge the battery once an adjustable lower limit has been reached.
The speed is detected by an electronic rotary sensor on the front axle, which is included in the delivery. A mechanical speedometer cable cannot be connected. The reason for this is the extremely compact design of the speedometer.
All the tried and tested features of the SIP speedometers are included, such as a rev counter and temperature display, which effectively helps to prevent the engine from overheating on long journeys, for example. And also the more recent extensions, display of exhaust gas temperature (EGT, SIP art. no. 5001EGTJ) and the mixture composition rich/lean via lambda sensor (AF sensor, SIP art. no. 5001AFJ0) are also possible on these new speedometers.