The Womanizer Duo 2 Blue Stimulator is a sex toy that combines clitoral stimulation with penetration. To use it, it is recommended to apply water-based lubricant to the contact area, turn on the device and select the desired intensity. Then place the clitoral stimulator over the area and insert the other end into the vagina. It is important to follow the manufacturer's instructions and clean the product before and after each use.