The MachO Collection Snap-On Vibro Cock & Ball Strap from Nasstoys. The vibro snap-on cock and ball strap has a bullet attached for powerful stimulation. Secure, adjustable snaps. Powerful single speed bullet included. Prolongs & strengthens erections. Adjustable for men of all sizes. Phthalates free. RoHS compliant. Material: PVC & ABS. 3 LR44 batteries included.