This dual-wavelength laser source, model 810, determines fiber type and tests continuity as well as optical loss. It features low voltage warning, automatic power off, and simple push-button operation. The working wavelength switches between 310 nm and 1550 nm (±20 nm). This laser source is compatible with FC, ST, SC adapters and offers an LED status indicator for output wavelength display. It operates continuously for five hours on a single charge.