The 360 degree swivel personal massager is for external use only. If you have roommates or live with people you don't want knowing you have a sex toy, then definitely avoid this. It will give you away as soon as you turn it on. I don't even think it is waterproof since the battery cap just slides open. It at least has two heads for different kinds of stimulation so it's like you are getting two toys in one.

It's entirely made of plastic. One head is nubbed while the other one is smooth. There was no smell or taste when I received it. You can use silicone or water based lubes with plastic, but the smooth surface has no drag to it.

The design is fairly discreet but the noise it makes is definitely not. It is only 3" tall and 2 1/2" wide which fits easily in the hand.

The nubbed head is too spiky for using on the clitoris but is great for teasing, and the smooth head provides very broad stimulation. People with any experience level could use this as long as they don't mind the noise.

This massager runs on two AA batteries not included. The battery compartment just slides open and it's easy to tell which way the batteries fit in. It has two speeds of vibration low and high. The power switch slides up and down and I don't like this type of control because with lubed hands, it's very difficult to change the speed or turn the toy off.

This toy can and will be heard through a closed door or walls. I have the Mini Miracle Massager and this toy is louder than that. I don't have the Hitachi but I'm sure this can easily rival that as well.

The vibrations are very defused which end up not giving me enough stimulation. The heads are also hard to change around because it is so stiff. This toy did not work out for me and I can't recommend it because of all its flaws.

Simply rinsing it with water and soap will do. You can also wipe it down with rubbing alcohol to sterilize it.

Plastic won't react with other materials so it's safe to store wherever is convenient.