features：
1, wireless operation, without space constraints.
  2, friction time adjust knob.
  3, strap tention adjust knob.
 major parameter:
weight: 3.5㎏
BATTERY:two batteries
width:12mm-16mm(ADJUSTABLE)
 PET thickness:0.5mm-1.0mm
PP thickness0 .4mm-1.0mm
seal notch way:friction welding joint
 tensile force: 40-200KG
charging time:120 min
battery life:3000 times