This is a 532nm green powerful dpss lab laser system. It is a 10W high-power laser with a cooling base at the bottom of the laser module. The light outlet of the laser module has a protective cover, which must be unscrewed before turning on the laser. It's outpur power is adjustable from 0~10W. The working mode has continuous working CW and modulation mode TTL & Analog switchable. www.civillaser.com