The Grunge vibrator is a basic rod vibrator, but that certainly does not cover its load. It may have a basic shape without too much fuss, but its powerful engine is anything but basic. The Grunge vibrator is made of dimensionally stable ABS plastic which is nice and smooth. Another advantage of the smooth ABS plastic is that it is very easy to clean. The Grunge vibrator also has different pulsation patterns, so you can choose what your favorite position will be. These positions are easily adjustable by using the handy push button at the bottom. You can switch the vibrator on and off again by holding the same push button for a few seconds. The Grunge vibrator works on 2 x AA batteries, which are not included.