The Secret Weapon Vibrating Cock Ring is a velvet-soft silicone ring that supplements lovemaking with sweet vibrations. It inhibits blood flow, which can help increase his erection and delay climax plus it features nubbins on the side facing her for extra stimulation to her clit beyond the single-speed vibrations. The bullet is removable and can be used independently as a clitoral vibrator. It’s all waterproof, so feel free to play in the shower, tub, pool, waterfall… Maximum diameter 1-3/4”. Uses 3 LR41 batteries; comes with one set installed and an extra set, although please note we won't guarantee the batteries will be any good, since we don't know how long they've been in storage; if you need replacements we sell LR41 Batteries 12-Pack that will work with this toy. From the Fifty Shades of Grey Weekend Collection.