1、Functional Suction Cups: 2 suction cups allow horizontal square installation on smooth surfaces (such as clean glass and ceramic tiles). Alignment guides are arranged at 90 degrees, and the angle of rotation is calculated and rotated in 5 degree increments. 2、Laser Convenient Level: The convenient and laser compact level can produce 2 lines on the floor, wall or other surfaces at a 90 degree angle, helping you to square, align and angle, and appearance layout at 90 degrees. 3、Precise Alignment: The dual level bubble and laser of the infrared level can accurately align a plane or a straight line. 4、Time Saving: The scale of the level gauge can be changed according to the angle of the marking, which saves the laser and marking time, which is an effective tool to stake out the angle. 5、Application: This infrared level is used for woodworking, stair starting boards, shelves, forming, laying tiles or any other work that requires precise alignment.