Keep your pet safe at night with Coastal's new, lighted collars. These black, nylon collars are lined with red, flashing LED lights providing high visibility in the dark. Lights are powered by a replaceable 3 V lithium battery, which is included, and last for hours. The small, compact battery pack activates the lights with a convenient on / off push button without adding extra bulk to the collar. The 14" and 18" have 4 LEDs and the 24" collar has five.