With more than 6 Million units already in service, TORTOISE is very easy to mount in all scales, it absorbs very little current (4 mA in operation) and gives the switch blades this movement so characteristic of the real thing. Powered by an adjustable DC power supply, TORTOISE ensures that the switch blades stick together and has 2 built-in inters to control lights, TCO indicators, blocks and relays.... Powered by 2 continuous power supplies in head to tail, its wiring is very simple and economical because there is only one wire going from the TCO to the TORTOISE while keeping the repetition of the switch position at the TCO! It is delivered with the necessary connection to operate and its installation is very simple: a 6/7 mm hole in the running board. TORTOISE can also be used for other applications (PN barriers, mechanical signals, etc.). Complete and very explanatory manual. Warranty : 9 years !