It is a 5 in 1 studio E27 lamp socket adapter.This product is mainly used in photography.  
It allows 5 bulbs installed in one single socket at the same time for bright illumination.  
Each socket on the adapter can support up to 200W, so it supports up to 1000W in total.  
With five independent switches, can control each bulb. 
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 base  
Support power: 200W * 5 (1000W in total)  
Color: Black & white  
Suitable for: Studio daylight bulbs in photographic use  
Package size: 19 * 20 * 18cm / 7.5 * 7.9 * 7.1in  
Package weight: 1094g / 2.41LB 

Package List: 
1 * Base Socket Adapter  

Note:  
This item only includes the 5 in 1 studio E27 lamp socket splitter adapter.