You use the bulb end to hold the Tantus Strapless™ in place using your internal muscles and with the new velvet surface it's easier than ever to hold on to. The shaft end of the dildo comes up at a natural angle allowing you great penetration of a partner. No muss no fuss. Wearing the Tantus Strapless is a very different strap-on experience. We recommend you wear it around the house getting used to your new center of gravity how it moves and how you can control the movement before you try it with your partner. Vibrator: Single Speed Removable Waterproof Bullet Vibe Uses 3 x LR44 Type Batteries. Dildo Diameter: 1.5". Dildo Length: 6". Bulb Diameter: 1.5". Bulb Length: 2.5".