Features:This product is mainly used in photography. This is a 3/4 in 1 studio E27 lamp socket splitter adapter for studio daytime bulbs. It allows 3/4 bulbs installed in one with a single outlet at the same time. Each adapter socket can support up to 60W. So it supports up to 180/240W in total. This idea for more light for photos or video, if you want to upgrade the lamps with a single socket, replace a single bulb to 3/4 bulb, it is the best choice. It is the base of E27, the same as a normal household bulb socket. Specifications:Stand Type: Standard E27 Base Support Power: 60Wx4 (240W Total)Color: White Size:3 in 1: 10x11cm(RxH)4 in 1: 13x11cm(RxH)Shell Material: PBT Nominal Voltage: 110V-240VNead Suitable for: Home and Studio Bulbs for Photo Use.1 x Socket Base Adapter(Bulbs and holder are not included.)