The Electric Warning Signal is a ringing bell for a highway crossing warning device to aurally alert motorists and pedestrians of an approaching train.

The Lionel 69 Electric Warning Signal was the first accessory to use the isolated outside rail for activation. See History of the Insulated Outside Rail .

The Lionel 69 Electric Warning Signal is 8 3/4 high, making it a 1:48 scale model of a 35' high signal.

The Lionel 69 Electric Warning Signal is made entirely of formed sheet metal. The brass sign is etched and filled. The bells and mechanism cover are plated. There are variations in the base and girder color sign material and the lettering on the sign, and in the number and shape of the bells.

There can be one or two bells. Two-bell devices can have round or straight sided bells. The base and girder can be white, cream, maroon, light red, bright red, light olive green, dark olive green, and a green base with a yellow girder. The sign can be brass, nickel-finished, or aluminum with red or black lettering.

Electrical connections are made to two binding posts on either side of the bell mechanism. Nominal operating voltage is 12 volts AC. The coil draws about 0.5 ampere with roughly a 50% on/off cycle time.

An adjustment screw on the left side of the mechanism can be used to change the sound produced. The sound is not great at any setting.

The Lionel 69 Electric Warning Signal can be operated with Three-Rail Innovations' Two Relay Controller .

An isolated rail track block is constructed positioned so that the accessory is activated before the train reaches the highway and stops after the train has passed the intersection.

The 2RC features of OFF/ON, Limited, Slow Flash, Relay-On-One-Time, Short-Time-On, Crossbuck, and Slow Crossbuck can be used.

The electrical coil can overheat, so some operating time limitation is prudent.