Ace is a waterproof medium sized vibrating butt plug made from silky soft silicone with stimulation ridges on the shaft. It has six powerful and quiet functions including 3X vibration, 2X pulsation and 1X 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. The medium has a maximum diameter of 1.50". The insertable is 4.13" and the neck diameter is .60".