What is the best job for user to make clear and fine enough cross line alignment? For operation of those of night version fields, it always makes good job with a long wavelength device, such as a 808nm infrared crosshair laser module. It is emitting invisible infrared laser beam directly from a 808nm infrared laser diode. The advanced use of qualified glass coated lens with 10, 15 and 110 degree assures different dimension and high linear quality infrared cross line projection at various work distances. Only if compact size tube made infrared laser module gets easy installation and adjustment of both infrared cross line fineness and emitting direction within three dimension, it always assures the lowest prices, the most stable and reliable infrared cross line alignment for all night version application fields perfectly.https://www.berlinlasers.com/808nm-infrared-crosshair-laser-module