An improved massager that includes a chassis with a housing space, whereas the housing space is connected to the outside through two openings. Two impact power units is configured inside the housing space, each provide a partial portion to pass through the two openings to extend outside of the chassis, and each connects to a massage head. The improved massager also includes a control unit includes a main circuit board, an operational switch with at least one level of operational state, and a control circuit board to link to the impact power units. In the control circuit board, there are multiple adjustment units. Each adjustment unit is linked with the adjustment knob outside of the chassis. The side of the chassis extends a grip portion configured with a control operational switch that has at least one state of operation. By adjusting each adjustment knobs, the adjustment units can provide different level of control adjustment so that the circuit board can control the two impact power units to provide different impacts from linear regular motion features with different forces and frequencies.
