Number of lines and distribution: Produces 5 laser lines (usually green or red): Two horizontal lines (one at 360° and another passing from the top). Two vertical lines (forming a 90° angle). A plumb down dot on the ground. Leveling feature: Features self-leveling, where it automatically adjusts itself within a certain angle range (usually ±3° or ±4°) to ensure leveling accuracy. Accuracy: It has very high accuracy, usually around ±1 mm per 5 meters. Working range: The line visibility range reaches about 10 to 30 meters, and this range can be extended using an external laser detector. Battery and operation: Works with either a rechargeable lithium-ion battery or regular batteries, and has good operating time.