This vibrating urethral sound has amazing potential. It is devious in its intended purpose, creating some intense urethral sensations. It also can be used as a pinpoint vibrator. Medium: 1 in. circumference at the tip and 0.75 in. circumference at the shaft. Total length of 7.5 in. with an insertable length of 4.25 in. Requires one AAA battery, not included.