There are special plugs in the set with the insert, which make it possible to install it on one or two sides.One-sided, two-sided, or three-sided, it depends on you. What impressed people is the three-sided ember bed. Usually, There are several kinds of media such as logs and crystals including clear crystals, black crystals, and big crystals.With more than 7 colors of ember light, you can have more color when you use your smartphone app. Let’s have a look at our website: www.fireplaceempire.com