Some sessions are better than others. This one is better than most. The Apollo Hydro Power Stroker gives you a vibrating stroker you can actually feel the difference with, and that difference is real from the first use. Thirty functions means you are not stuck with one setting that is almost right. You dial through until you find exactly what you want, and the memory chip means next time it picks up right where you left off. No fumbling, no starting over.The textured sleeve does real work. The internal chamber creates friction and sensation that a plain sleeve simply cannot. Pull off the suction cup base and you have a handheld stroker. Mount it to a flat surface and go hands-free in whatever position actually works for your body. The swivel base gives you range. And since it is fully waterproof, the shower is a legitimate option, not an afterthought. The sleeve is removable and replaceable, which means this stays in your rotation long term.This is a well-built piece of kit from a brand that has been doing this for a long time. If you have been using something that is just okay, you already know the difference a quality product makes. This is that upgrade.Product DetailsOverall Dimensions: 9.25 x 3.5 inches (23.5 cm x 9 cm)Sleeve Dimensions: 4.75 x 2.25 inches (12 cm x 5.75 cm)Total Functions: 30Vibration Modes: Vibration, pulsation, and escalation patternsWaterproof: Yes. Safe for use in water, bath, or showerMaterial: Sleeve: TPR. Case: ABS with PU Cote. Control button: SiliconeSpecial Features: Removable and replaceable sleeve, suction cup base with swivel mount, memory chip resumes last function used, hands-free capable