Made of 100% silicone. this finger vibrator has a 10-speed vibration mode will go up to 11.000 rpm. The ultra-low noise level of less than 60dB. and its ergonomic design. makes this toy very discrete. Measures 4.13 in. (10.5 cm) high. 1.25 in. (3.2 cm) diameter. Waterproof. Three LR44 batteries included.