... optical light source 1.Multi wavelength outputaa 2.Adjustable outputaa power 3.Tone generation, 270HZ,330HZ, JW3111 optical light source Features JW3111 optical light source ... Is a handheld optical light source, newly ... (g)370Standard Packages MODELINCLUDESAll JW3116 ModelsJW3116 Optical Light Source, 3pcs 1.5V Batteries, Power ...