Function: 10 Frequency Vibration Color: Black Size:  S: 9 * 3 .2cm/3.5" * 1.3" (85 g/0.19 lb/3 oz) M: 12.5 * 3.5 cm/4.9" * 1.4" (96 g/0.21 lb/3.4 oz) L: 15.5 * 3.7 cm/6.1" * 1.5" (152 g/0.33 lb/5.4 oz) Power: Lithium battery Material: ABS +...