The Julia Saliva Microscope is a pink, lipstick shaped microscope designed to tell you when you are ovulating simply by placing some saliva into the eyepiece and observing it at magnification when it dries for ferning, indicating ovulation. The reality is of course not that easy.
The eyepiece is tiny, you have to unscrew it and 'place' your saliva in the tiny hole. How you are supposed to put saliva in the hole without flooding it is beyond me, then you are supposed to wait for it to dry - 5 to 10 minutes apparently. After half an hour I gave up, I don't know whether I have particularly wet saliva or it's just because I put too much in, but either way it wouldn't dry.
Then you have to put it back on and adjust the focus while pressing the little light at the bottom to observe the ferning. the focus is the eyepiece apparently, which you just screwed back on, so it seems to involve unscrewing it which makes little difference. The light is far too bright, so you have to observe the saliva around the edges where the light isn't too bright. Then you have to clean it, you are supplied with a large lens cleaning cloth, the hole of course is tiny, how on earth that works I don't know! Also the instructions are (badly) translated from some foreign country as it "...easily help your face the contraception or impregnation easily. Drop your sailva only!" Ha!
It's not very well made really, for the price, for less I have better made lipsticks! And the lenses are so hard to keep clean, you will always see bits in it when you look through the eyepice, very frustrating. But I suppose it would be clear when your saliva is ferning, although I haven't got that far yet!