Mrs Einstein is an artificially intelligent Rabbit Vibrator with 72, yes 72 ic controlled speed functions. It has a perfectly positioned clit stim and the soft jelly shaft even rotates in both directions. It has an LED control panel readout and is controlled by the buttons around the readout panel. The shaft contains 5 rows of beads for added stimulation. It even illuminates in 3 colours, red green and blue, that keep in time with the speed settings. It has a diameter of just under 1.5 inches and a max insertable length of just under 6 inches. This vibe really is from the future! 4AA batteries required.