... the advantages of both domestic and foreign low frequency and intermediate frequency .3: According to different disorders with various specific ... stimulation of allergyTechnical Parameter: 1, Safety classificationClassⅠType BF conventional equipment2, Current source AC220V±10%, 50Hz ± 2% ... time ≥4hr 5, Output current 0~90mA 6, Frequency of operation 500Hz,2000Hz,3000Hz,4000Hz,5000Hz,6000Hz 7, ...