Another great couples toy from Screaming O, the PropellO is a vibrating cock ring with two big, distinct ends for full-coverage stimulation. 

A strong, stretchy band fits around the base of the penis and around the testicles, helping to keep him hard and in control while also transferring the vibrating sensation. A vertical clit stimulator and identically shaped perineum/ anal tickler protrudes from the opposite end, both are covered in intense nubs and teasing fingers for tons of unique sensation. 

The vibrations are powered by two super powered bullet vibes that slip into both stimulators, each has a simple on and off button for no-nonsense operation, and can be used independent of the ring. 

A safe, silicone based rubber material makes up the PropellO, it's sturdy and long lasting, just use a good water based lube if needed to keep it at its best. Each bullet takes 3 LR44 cell batteries, which are included. Waterproof.