Lightweight, sophisticated aluminum massager. High intensity motor with 2 speed push button control. Aluminum maintains and retains body heat. Therapeutic rays for increased blood circulation. Warms to an incredible 124 degrees Fahrenheit or 51 degrees Celsius as it vibrates. Waterproof for play in and out of the water. Safe and pure for body and pleasure made using phthalate free materials: Aluminum massager, ABS plastic with metallic paint cap, Silicone button. Vibrating sex toy requires 2 C batteries not included.