The Ego e3.5 by Jopen is a wonderful, powerful, USB rechargeable, waterproof, 100% silicone vibrating cock ring. Jopen by far has THE strongest vibrating cock rings that I have tried. They really do seem to turn your lover's penis into your own, unique, personal vibrator when he slips it on. You can also slide this over a dildo. The elongated , pointed head of the 3.5 gives contact right to that special spot without having to be pressed together (like with the others, though the e3 allows for SOME space). With the multiple speeds of powerful vibration, this is bound to turn things up in the bedroom for beginners to experienced users. Use it in the bedroom or take things into the bathroom!

The e3.5 is made of that super velvety, soft Jopen silicone. There is a good bit of drag to the silicone and you and/or your partner may find that water based lubricant helps to get it on. The button is locate don the top of the head and can be felt as it is raised. There are some words imprinted that can be felt when running your finger over it, but being that it's located on the top of the ring, it does not come into contact with yo or your partner's skin. The charging port can be felt and does face his body but this shouldn't cause any distraction. There is a slightly visible seam but it can't be felt. The material is pretty stretchy and should fit most men. The tip of the head (that comes into contact with the vagina) is slightly flexible right at the tip, but you really have to press down with your finger for that to happen, so it isn't something that's likely to happen while in use. The 100% body safe silicone rates a 10 on Eden's safety scale and is ideal for any user. There wasn't any detectable scent to the silicone.

The e3.5 is made of silicone that has a good bit of stretch to it. I was able to get it over my hand, down to my wrist. My guy said that it was a comfortable, tight fit. It should be fine for just about any guy. The e.3 has an elongated head that tapers down toward the rounded point tip; this makes it great for coming into contact with the clitoris during sex. Since all women's anatomy are a bit different, it could be a hit or miss for some. Either way, when grinding close to each other you will be able to the same effect with it as the other Ego rings. Due to the drag, it is easier and more comfortable to put the ring on after applying some water based lubricant to his penis and around the inside of the ring.
The measurements are:
Max stretched diam.: 1 3/4"
Unstretched diameter: 3/4"
Diameter: 3/4"
Length: 2 1/2"

e3.5, e3, e2, e1

The e3.5 can take up to 3 hours to charge (by USB cable), though ours took about 1.5 hrs to fully charge. An LED light will come on when it's charging and turn off when it's finished. The charging port is located on the back of the head.


Our last Jopen ring came locked, however, my fiance said he just turned this one right on after charging. If yours doesn't start up then it may be locked. All you have to do is press the button quickly three times. To lock it again (for save travel), simply do this again. The light comes on and stays on for about two seconds once it's locked.

It is easy to use, simply press the button on the top and hold down until you reach your desired speed. The light will blink while holding the button down, going through the speeds. It will stop blinking when the maximum speed is reached. To turn it off, just press the button.


The vibrations are deep and a bit rumbly AND buzzy. This thing packs power well enough to travel through his penis. So not only do you get the satisfaction of the tip hitting your clitoris, but you get to feel the vibrations internally (though not as strong as the tip feels). You both get to enjoy the vibrations with this ring! There are no patterns, just steady vibrations. I figured the vibrations would be strongest in the base of the ring, but to my surprise, they actually feel strongest in the tip (or they do to me). He said he couldn't really tell because of how strong it was and that it was vibrating his entire penis.

Another great thing about the e3.5 is that the vibrations cannot be heard outside of a closed door. No loud, annoying buzzing sounds, just a low hum that will only be heard inside the room.

The box is tasteful, though not discreet as it's picture on the back along with information all about the e3.5. Inside the box is the ring nicely nestled in it's own little spot, an instructional booklet and the charger. It comes with an optional 10 year warranty which you can find out information about by visiting the manufacturer website.

Out of all the Ego rings, I think my favorites would have to be the 3 and 3.5, the bulkier heads help stimulate the right area and the powerful vibrations travel well through the ring and his penis.