Prepare for deep, powerful sensations. The inner weight inside the plug uses unique Kinetic Technology to create an ultra-powerful thumping motion. WIth 7 functions: 3 speeds & 4 patterns. Powerful thumping actions! Made from premium silicone and it is rechargeable. Remote control uses two AAA batteries (not included). Overall length 5″, widest diameter 1.5″, insertable length3.7″.