The Wein Prod Inc WP500B Flash Meter is a specialized light meter designed to measure flash output accurately. It provides precise readings of flash intensity, enabling photographers to set the correct exposure when using studio or off-camera flash units. The WP500B features a simple interface with a clear analog display, making it easy to use for both professionals and enthusiasts. Known for its reliability, this flash meter is a valuable tool for ensuring consistent and well-exposed images in flash photography.