It's a furniture to keep sims attached to for a prolonged time. It's not unlike a bed or shower or other need-fulfilling furniture. There can be several models of it and/or several upgrades depending on model. Possible functions of it are:   1. Select outfit that attached sim will be dressed in and/or their pose. 2. Choose the needs that will be filled. By default it's sleep, but there can be attached feeder, waste disposal unit, shower for respective needs. Head display/VR g