Check the listing for details. Dual Caboose Marker Light Kit, Battery Operated LEDs, N/HO Scale. Condition: New. Listed at 9.95 USD. Dual Caboose Marker Light Kit Two Red "PICO" LEDs, Battery Holder, Battery, On/Off SwitchNOTE: This is NOT a "beginner's" kit.Soldering, measuring, wire cutting, custom installation REQUIRED The pictures below show installation in an N scale caboose. The tiny "PICO" LEDs allow installation in any scale without sacrificing brightness. NEW Battery Size: This now comes with a smaller battery (CR1220) and battery holder that should fit in most HO or N scale situations. The battery is available at Walmart (online and in some stores) and other stores. The kit provides the pieces to install 2 Red LEDs in a caboose model. It does not include a light fixture. It's up to you to install in your caboose. This REQUIRES cutting the wires to fit, drilling holes for the LEDs, soldering, etc. It requires knowledge of LED and battery polarity and correct wiring.The switch allows the LEDs to be turned on and off. To access it without taking the caboose off the base requires drilling a hole to allow you to activate the switch (secured with superglue) with a small screwdriver or toothpick.