The BLLNDX E26 Medium Socket Adapter 4Pairs is a set of fourpc male screw in light bulb sockets with a pigtail design. These LED sockets are compatible with standard light bulbs and are designed for indoor use. The matte finish adapters are made of PBT material and have a voltage of 600V. They can be easily installed by plugging in or wall mounting, and are lightweight at only 0.25 pounds each. The sleek solid design and touch switch make them a stylish and convenient addition to any room.