Colorless glass objective, providing excellent image quality Rotating the focusing circle can provide an appropriate focusing angle The universal 2.5mm adapter is used as a standard adapter for metal rings in almost all ST, SC, and FC connectors Integrated laser safety filter (not used for observing optical fibers emitting light) LED coaxial lighting with 1000 hours of lamp holder lifespan and longer battery life The side lighting port can be used for backlight inspection of jumpers and can serve as a fault finder Durable aluminum alloy shell, soft lined storage box Including 3 AAA batteries