1、Output pulse waveform is bi-directional asymmetric square wave (rectangular wave). 2、Pulse frequency is continuously adjustable within the range of 0.5Hz~5Hz with a tolerance of ±20%. 3、Pulse width is divided into two grades: a) For the treatment of complete nerve loss: 10ms short shaped wave, tolerance ±20%. b)Treatment of partial loss of nerve: 5 consecutive rectangular waves of 1ms width, tolerance ±20%. 4、Maximum output current: A, B, C three groups of independent output, each group of output current peak Ip in 500Ω load are not more than 50mA. 5、 the maximum open-circuit output voltage: when the output is open-circuit, the peak output voltage should be not more than 500V. 6、Anti-short-circuit and open-circuit capability: After the output short-circuit and open-circuit test, the instrument should work normally and the performance should not be weakened. 7、Continuous operation time: not less than 4h 8、Timing time: divided into 5min, 10min, 15min, 20min, 25min, 30min six grades, every 5min a file, sub-file Adjustable. When the time comes, there is a sound chime. Tolerance ± 10%. 9、Single pulse power: When the output amplitude is maximum, the power of each pulse should be not less than 7 μC. 10、Single pulse energy: the maximum output energy of a single pulse of the skin electrode should not exceed 300mJ. 11、the output amplitude adjustment should be continuous and uniform, the minimum output is not greater than 2% of the maximum output Through the low-frequency pulse current stimulation of innervated muscles, so that it produces rhythmic contraction, improve muscle tone, maintain muscle "health" state, and delay the muscle "health" state. Healthy" state, delaying muscle atrophy and promoting nerve recovery; -To meet the requirement of at least 10ms pulse width for reliable excitation of denervated muscles, so that the muscles of denervated muscles and hypotonic cerebral palsy can be excited. The muscles of both the injured muscles and hypotonic cerebral palsy children can be excited; Three-channel output with continuously adjustable frequency and independently adjustable stimulation intensity can treat three patients or three parts at the same time; -According to the patient's condition, "partial" and "complete" loss of nerve can be selected for treatment in two grades; -Computer timing accurate 5, 10, 15, 20, 25, 30 six files, the end of treatment with chime function; -With output blocking function, if the output adjusting potentiometer is not in 0 position, the output cannot be started. -Can carry out bipolar group electric stimulation, unipolar motor point electric stimulation, degree treatment, and in the "part of the loss of nerve file" to connect the millineed needles, to carry out electroacupuncture treatment, etc. Electro-acupuncture therapy, etc.