Generation 4 mode is the therapy-bed under where is the control-box fixed like a drawer whose cool light-shining key –board can be operated in the darkroom .Its control system is made of micro computer,covered by ABS engineering plastics on its outside,its shooting system and ultrasound parallel system can move to any location by the therapy –bed .we can get the different pictures because the ultrasound parallel system can located the colculus from the different angle,then we can locate the calculus in the body of the patient.

(2) Reflector:
Second focal point and the generator surface ≥150mm

Realize the high efficient lithotripsy with low voltage.
（3）Lens

discharge the electrode,it’s easy to wear off and should be replaced before each therapy of a new patient.
(4)focus:

Radial:≤±10mm   Axial:≤±80mm
(5) Shock wave
Pulse width: 1μs
Wave front: 0.5μs

(6) Operating voltage: 14-19KV
Shock energy: 98-180.5J±