Gentle massage: The 26 static-free silicone massage combs gently massage the head points. Practical design: Non-slip surface makes the massager easier to hold and its small size makes it convenient and portable. Input voltage: 3V. Power: 2x AAA batteries. Head massager: Get a handheld electric head massager and alleviate all that built-up tension. Shell material: ABS + TPE. Electric Head Massager | White | Living Social