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 3.94 in. (10 cm) high. 1 in. (3.2 cm) diameter. Waterproof. Three LR44 batteries included.