Power options vary by product: some massagers plug into an electrical outlet, many use built-in rechargeable lithium‑ion batteries (charged via USB or magnetic chargers), and a few are nonpowered designs labeled “No Battery Used.”
Look for listings that say “waterproof,” “fully waterproof for the bath or shower,” or describe the item as “shower ready”—those indicate the product is intended for bath or shower use.
Common health-friendly attributes include phthalate-free, hypoallergenic, BPA-free, and latex-free formulations; some also state “No Fragrance Added.” Typical product warnings include labels like “Adult Use Only” and “Keep out of reach of children.”