3W5W UV laser marking ABS switch panel Laser engraving text on smart home switch panel makes life more interesting Plastic switch marking company once again returned to buy RFH 3W5W laser The text pattern on the switch panel can be specially engraved by a UV laser.   The switch panel currently used in smart homes can not only control the turning on and off of various lights and electrical appliances in the home, but also adjust the functions of different modes in the house, such as wake-up mode, sleeping mode, and so on.