Peace, mercy, and blessings of God be upon you. Massage device that works. Vibrating Heads: Comes with a massage head equipped with multi-point protrusions (shown in the picture) to provide deep vibrating massage that helps release tense muscles and stimulate blood circulation. Operation and Power Source: Works with a cord via a dedicated charger input (DC) shown in the middle of the picture, and connects directly to electricity or to the charging base depending on the model. To control the device's on/off and adjust vibration levels and speed (strong / light).