Abstract: In certain example embodiments, provided is a compact massager, comprising: (1) one or more massage head attachment portions; and (2) a massager body, wherein the massager body is configured to connect with the one or more massage head attachment portions at the front body side, the massager body further comprises: (i) a motor; (ii) a PCBA; (iii) a display; (iv) a power source; wherein the power source is configured to electrically connect with the motor, the PCBA and the display; (v) a Z-shaped, transmission crank, configured to translate rotary motion from the motor to reciprocating motion of the one or more massage head attachment portions; and (vi) a counterweight, having an eccentric cam, an input shaft and an output shaft, wherein the input shaft is disposed at one side of the cam and is operatively connected to the motor, and an output shaft is disposed at an opposing side of the cam and is operatively connected to the transmission crank.