The Wireless Rocking rabbit is a pretty neat toy. Personally, I loved using this toy (the one time I got to use it.) It has two bullets that are removable for easy clean up.
The bullets are placed to give you clitoral stimulation and rectal stimulation, as well as a vibration that travels through the penis, so pretty much everything down there is vibrating.

This toy is made from TPE, which is a rubber polymer blend which is porous. Make sure to wash the toy before and after every use. Clean with soap and warm water. Do not boil this toy. Only use silicone and water based lubes with this toy. Using an oil based lube may cause damage. You’ll also never be able to get the oil off. Flavored and heating/cooling lubes are fine.

So, down to the actual use of the toy. I tried this out with my husband. At first he was all for it. He thought it would be fun and exciting. He had never tried a cock ring before. As soon as he put it on, he was a little put off by how tight it fit, and we thought maybe he would adjust. After a little while, he just got more and more uncomfortable and said it was way too tight. This toy is very bulky, too. Both the rabbit ears and the anal stimulator are pretty large, and the ring itself is huge. By huge I mean thick; it’s probably about inch and a half deep.

The TPE does not give, so if you’re too big (more than two inches around,) you're out of luck. I haven’t been able to get a second go with the Wireless Rocking Rabbit cock ring, but I enjoyed it while I was able to keep it on him.