924B lamp holder adapter. Add two outlets to a bulb socket. Adds two convenient outlets to a standard (medium base) bulb socket. Ideal for workshop, garage, utility room. This is a Polarized device. It has polarized outlets lone slot is longer than the other). The polarized plug is not intended to be used with nonpolarized outlets (where both slots are the same size). A polarized outlet is intended to fit with a polarized plug in only one way - the longer slot with the wider blade. This Jasco product comes with a 90-day limited warranty. Visit www.jascoproducts.com for warranty details and product registration. Questions? Contact us at 1-800-654-8483 between 7:00AM-8:00PM CST. UL listed. This package is recyclable. Made in China.