This is a universal circuit board with several LEDs for installation in most passenger cars in the Märklin H0 assortment. A built-in buffer memory allows flicker-free operation. The brightness of the interior lighting can be adjusted manually. The circuit board can be cut at several locations for shorter cars. Retaining brackets for mounting the circuit board in the car are included.
Taken from the Märklin H0 program
Separate connection hardware such as the 73404, 73405 or 73406, or the 72020 current-conducting coupler with a 72050 ground spring is required for electrical connections, depending on the car type.
In DC operation, the separate 66715 and 66716 connection hardware is available.