The application  method:                                                                                                 1. In the laser handle's plug insert in the power source socket of the case, then puts through 110-220V power source.2. Press down the Power hey, the indicating lamp is bright, power source is connect. 3. Press down the timer key, select time.4. Press down on the laser handle the pessimistic key, the laser is the continuous working, the second time presses down the pessimistic key , the laser is the pulse working, the third time presses down the pessimistic key ,laser stop work..5. The timing light glistens, enters the readiness for action, restart presses down the pessimistic key again.                                                                                                  Low level laser therapy causes certain photochemical reactions to occur to help control pain, reduce inflammation,and accelerate healing of damaged tissue. low level laser therapy treats  a variety of conditions including: arthritis, tendon and ligament inflammation, nerve root irritation,shoulder and back pain,repetitive strain injuries, plantar fascitis, burns, wounds, variety of skin conditions.