SDJS-121 SOD Female Employees: A 150,000 RPM (30 times faster than traditional models) ultra-high-speed electric vibrator that brings you to climax! In order to find the most pleasurable electric vibrator, they volunteered to be test subjects, challenging the development of new electric vibrators while reaching climax, resulting in their pants being soaked through. The four of them reached a total of 78 climaxes!