PalmPower Pocket provides you with a travel-sized, super-charged massage that sends relaxing sensations throughout your body with phenomenal intensity, in the palm of your hand. USB rechargeable. No batteries needed. Ground-breaking power is now pocket-sized! - USB rechargeable - Easy one-press button - 7 functions - Intense PowerBullet vibrations - High-grade removable siicone head - Water resistant Dimensions: 3.5 x 1 in.