Apollo Hydro Power Stroker - Blue. 100% waterproof, totally self-contained power stroker. Vibrating pleasure stroker with textured chamber for added sensations. Removable sleeve for easy cleaning. 30 incredible functions of vibration, pulsation and escalation. Memory chip resumes on last function used. Easy push button control. Optional multi-position hands-free suction cup swivel mount included. Materials: TPR (sleeve) Silicone (button, decor) ABS with PU Cote (case). 4 AA Batteries Required (Not Included) Dimensions: 4.75" x 2.25"/12 cm x 5.75 cm (sleeve), 9.25" x 3.5"/23.5 cm x 9 cm (overall).