Men can use it as a unique masturbator and couples can get simultaneously stimulated. A non-erect or an erect penis can be placed into the Plus II Duo.The 9 different types/ levels of intensity can be switched between. 100% waterproof. Black. measurements: 117 x 67 x 72 mm, opening-Ø 3.5 cm. Material: silicone, ABS, phthalate-free according to EU Regulation REACH. Includes USB-cable, storage bag and lubricant sample.