Upgrade your Postwar or Modern Era Crossing Signal with LED's and oscillating technology. Here is a simple upgrade kit to make your 154 crossing signal flash like an authentic signal. No more flashing abruptly or lights that do not look realistic. The kit comes with 2 large 8MM LED's with wires attached and 1 oscillating circuit board. Installation manual included. Being able to solder is needed for the installation. No alterations are done to the signal when installing the kit.