Check the listing for details. End Of Train Device for O & S Scale with Flashing Red LED Kit. Color: Red, Condition: New. Listed at 5.00 USD. END OF TRAIN Flashing Red LED O / S Scale KIT This kit provides the electronic components and instructions for adding a Flashing Red 3mm LED to your O or S Scale End of Train Caboose or Rolling Stock. The LED is operated by an installed On-Board 3V battery and switch. The battery is a quarter sized CR 2032 that will last over 100 hours of continual use. (turn off when not in use) No track electrical pickup is needed.. The ON/OFF switch can be located under the Car or in a window of the Caboose or car used. Instructions for installation are included. The kit comes unassembled and includes ..... · a 3mm Flashing LED · a slide switch · Battery Holder · Yellow LED holder. · Resistor · Connection wires · Heat shrink Tubing Adhesive putty to secure battery holder · Instruction sheet. The 3 Volt battery is not included due to postal regulations but is readily available wherever batteries are sold. See photos for more details or Project 7 at modeltrainsounds.comSoldering is required. (not for children). The caboose or rolling stock is not included. If a Non Flash LED is preferred please send a request with order. BUY IT NOW $5 plus $4.30 Shipping for one or more kits