A multiple-unit train or simply multiple unit (MU) is a self-propelled train composed of one or more carriages joined, which when coupled to another multiple unit can be controlled by a single driver, with multiple-unit train control.
Although multiple units consist of several carriages, single self-propelled carriages – also called railcars, rail motor coaches or railbuses – are in fact multiple-units when two or more of them are working connected through multiple-unit train control (regardless if passengers can walk between the units or not).
This video claims that the transmitter is self powered and hence needs no battery or other electric connection.
Is this possible? I have never come across an electronic device that runs self-powered.
Couple of things I think might happen here:
1. A solar cell in the transmitter?
2. Everytime...