1, power supply: 220V ± 22V, 50Hz ± 1Hz 2、Rated input power: 160-400VA 3、Lumbar traction stroke: 0-200mm 4、Lumbar traction force: 0-990N adjustable 5、Total traction time: 0-60min adjustable 6、Continuous traction time: 0-9min adjustable 7, intermittent traction time: 0-90s adjustable 8、Rotary action range: ±25 ° adjustable 9, into the angle of action range: +10 ° to -30 ° adjustable *Computerized control of all technical parameters of lumbar traction, to implement a variety of functions in combination with traction or a single function of independent use of all the information, automatic judgment of the traction machine's error messages and fault information, safety protection traction brought about by unnecessary injuries *Automatic compensation of traction force and over-force protection function. *8 different traction modes *Equipped with dual-core processing chip and independent operating system. *Five safety protections : with National Qualification Certificate."