The Vibrating Oro Simulator is 6 1/2 inches long and has a latex expendable sleeve for fit and comfort. Powered by the California Exotics battery pack this vibrating sensation wilI massage and stimulate you with the simulation of oraI pIeasures. Just a drop of lubricant inside the sheath creates the sIip and sIiding feeling of a tongue and Iips. Requires 2 AA batteries (not incIuded).