The Astral Quattro is designed to directly target the prostate and perineum for maximum stimulation coupled with sizzling vibration. Featuring four control speeds and a weighted interior ball that rolls around with movement for even more sensation. An easy grip handle with finger holes for better maneuvering and easy retrieval makes hitting your hot spot every time a breeze. The non-porous and phthalate-free material is easy to clean and safe for most allergies and lubes. Measurements: 6 in. total length. 5 in. insertable. 1.7 in. diameter at widest point. Requires 2 AA batteries. not included.