VanGuard Stereo Microscope 1X-4X LED Upper and Lower Illumination 1255SL VanGuard Stereo Microscope 1X 4X LED Upper and Lower Illumination 1255SL. Viewing Head Binocular Eyepieces 10X WideField eyepieces (DIN) Stereo Optics Dual power 1X 4X with controls on side of microscope Upper Illumination LED Lower Illumination LED. Warranty 5 years optical mechanical 1 year electrical.