Small but mighty. STAMINA MASTER takes care of the most sensitive part of your penis the head! Simply, insert your flaccid or erect penis in, turn the vibration on and let STAMINA MASTER do all the hard work no need for stroking at all. Go from soft to hard in a short span of time and enjoy an orgasm like never before. STAMINA MASTER packs a punch, as it heats to body temperature (98F) giving you a better than life feel. Ideal for those looking for a MAXTASY experience on the go, and those who want to try something new, STAMINA MASTER allows you to be in full control of your own pleasure. The deeper you go in, the more pressure inner walls create and you achieve a higher level of stimulation. Great for any experience level! Last longer in bed! One Year Warranty.