Nexus has packed everything you could ever want in a butt plug into Ace. Ace is a medium sized vibrating butt plug made from silky soft silicone with stimulation ridges on the shaft for stimulation where you want it most. It has six powerful and quiet functions including 3 X vibration, 2 X pulsation and 1 X escalation. All can be controlled either using the slim line remote control by the user or a partner or by a button on the base. Ace is rechargeable using a USB magnetic charger for convenience. Plug diameter at widest point 1.5 inches. Waterproof vibrations. The medium has a maximum diameter of 1.50″. The insertable is 4.13″ and the neck diameter is .60″.