The attachments can be used with or without the harness. The G-Spot is 7in long with a diameter of 1. The Vibrating Dong is 6 long with a shaft diameter of 1. The multi-speed power pack requires two AA size batteries, not included. The base of the attachments adds extra support during use and can act as a suction cup. The 56in adjustable extensions fit petite to the voluptuous. The harness has an open crotch for other enjoyments as well! Be seen and have fun no matter where you go!