40mw single green laser TECHNOLOGY PARAMETER:Control mode: Sound control, Master/Slave, ... function of ' BLACK OUT ' .Output power: 40mw/532nm, Green DPSS laserSafety Capacity: Sound active mode with the function of ... is no music. The slave units will shut off laser automatically without trigger signal during Master/Slave mode (over ... Roller skating rinks, DTV, Family party, etc. 40mw single green laser