Auto leveling alarm10m remote control, 3 auto leveling system. When the auto-leveling range is exceeded, the laser level will flash continuously and beep. This situation requires manual leveling. This can be viewed via the level bubble. The wall stickers are 360 without dead ends. The smooth, manual 360 rotating base makes it easy to adjust the laser line position. Features a fine adjustment knob for precise laser adjustment so you can work precisely. 4D 360 16 Lines Laser Two 360 horizontal lines and two 360 vertical lines provide complete leveling coverage of floors, walls and ceilings around the room. 4D laser line 16 lines for fine positioning, 4/8/12/16 lines adjustable. The 4D laser level provides full coverage with an accuracy of 1/10 inch at 32 feet and a maximum indoor working range of 30 feet, allowing you to work in different parts of large rooms. Energy SavingThe high brightness green beam is visible in sunlight and is brighter than the standard red beam. The 4000mAh rechargeable battery (charger included) can extend the usage time up to almost 8 hours. Rechargeable lithium battery provides over 5 hours of operation with all beam lines open. Rechargeable batteries are more economical than AA batteries. Wide application and easy to installHorizontal/vertical lines can be selected individually or simultaneously depending on the application on the job site. Ideal for helping with tile fixing, wall decoration, floor tile fixing, stair railings, etc.