... wavelength optional 2.Support FC,SC,ST adapter 3.Handhold, LED backlight, Auto shut-off Fiber Optical Laser Source (ST815) Fiber ... . With features of durable structure, large LCD display with backlight and friendly operation interface, the ST815 advanced stability handheld optical ... FC,SC,ST adapter--Big LCD, intuitive, easy to use,--LED backlight switch on/off--Auto close back light in 8 seconds ...