Turbo VIBRATING RING packs a powerful punch with four vibrating motors. Click on all four simultaneously or one at a time - you decide how much power you or your partner needs. The smooth silicone gives this reusable ring enough elasticity to fit any length or girth. 6.5 cm long, 3 cm inner diameter. Each motor is 3 cm long. Requires 2xbutton cell LR41 batteries in each motor (included). Running time is 40 minutes for each individual motor. Midnight Madness.