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 and 4 patterns. Powerful thumping actions! Made from premium silicone and it is rechargeable. Remote control uses two AAA batteries, not included. Overall length 5.3 inches, widest diameter 1.65 inches, insertable length 4 inches.