The movement of the toy's weights does not require any electrical power and it delivers pleasure for hours whether during intercourse with a partner and / or sextoy or as a little secret you carry around during the day. The B BALLS get to work without making a sound and thanks to their narrow base, they can be worn discreetly beneath the user's clothes. Due to their size, B BALLS are perfect for intermediate or expert anal players; they create a satisfying sense of being "filled up".