Features:This product is mainly used in photography.It is a 4 in 1 studio E27 lamp socket adapter.It allows 4 bulbs installed in one single socket at the same time for bright illumination.Each socket on the adapter can support up to 300W， so it supports up to 1200W in total.It is E27 base， same fit as regular household bulb socket.Light weight， easy installation.If you mounted four bulbs at same time， each bulb diameter must be less than 80mm.Specifications:Base type: Standard E27 baseSupport power: 300W * 4 (1200W in total)Color: Black & whiteSuitable for: Studio daylight bulbs in photographic usePackage size: 11 * 11 * 12.5cm / 4.3 * 4.3 * 4.9inPackage weight: 225g / 7.9ozPackage List:1 * Base Socket AdapterNote: This item only includes the 4 in 1 studio E27 lamp socket splitter adapter.