The Perfect Plug Plus is the perfect step up to intermediate anal play. The smooth silicone surface has an irresistible velvety feel while a Tantus Original Bullet adds 3 speeds of vibration for more intense stimulation. The Perfect Plug Plus has a long, flexible neck bends to natural curves and stays put for comfortable extended play, while the anchor base tapers for a flawless fit between the cheeks. The Perfect Plug Plus has 4 inches of insertable length with extra girth in the shaft and a 1.2 inches diameter bulb. Not harness compatible. Safe for your body: Made from Tantus own unique formula of 100% ultra premium Silicone. Easy to clean Eco-friendly, hypoallergenic, hygienic, boilable, bleachable and dishwasher safe. Please remove the bullet vibrator prior to cleaning. Battery operated. Batteries included. Batteries go in the vibrator with the part number side to the top. These little batteries are very common. Tantus recommends Duracell Batteries 357 or 303 as replacement batteries.