Throb your knob with this power thrusting head stroker! 2 powerful speeds of super stroking action. Removable textured super stretchy sleeve. Easy to clean. EZ sliding speed control. LED indicator light. Handy grip strap for secure use. ABS (case, switch, dcor ring, strap) TPR (sleeve) Polyester (elastic). 4 AA batteries. 3″x 2.25″/ 7.5 cm x 5.75 cm (chamber). 7.75″x 2.75″/ 19.75 cm x 7 cm (overall).