The stimulation coils with different cooling ways are optional, including natural cooled coil, semiconductor-air cooled coil and liquid cooled coil; The internal circulation system with intelligent liquid cooling way which can cool effectively; You can change the coil by yourself according to the different requirement; The coils can reveal the temperature and intensity in real time which allows users to adjust the intensity to determine the motor threshold rapidly; It will calculate the number of the output pulses automatically and evaluate the service life of the coil objectively