... Output Mode: Focusing, defocusing, diffuse beam Focal Length of Working Heads: F=100mm Conducting Beam: Red diobe laser (650nm, 2mw) ... , 4mW, single laser tube) ; HJZ-2B (ILIB laser, 4mW, double laser tubes) ; 3. Semiconductor laser therapy apparatus HJZ-2C (portable ... 500mW) ; HJZ-2D (single therapy head, 500mW) ; HJZ-2E (double therapy heads, 500mW) ;HJZ-2 (digital display timer with big therapy head ...