16 Lines 4D Laser Level-Two 360 horizontal lines and two 360 vertical lines provide full, flat coverage of floors, walls and ceilings around the room. The 4D laser level provides omnidirectional horizontal coverage with an accuracy of 2mm/10m, and the maximum diameter of the indoor working range is about 25m. Self-leveling and 3 tilt mode-Auto-leveling mode: After power on, auto-leveling mode is enabled by default. When the device exceeds the self-leveling range (3 degrees), the laser beam flashes quickly. Manual/tilt mode: After powering on, press and hold the open button for 3 seconds to switch to manual mode, which can lock the line at any angle. APP & REMOTE CONTROL- Comes with a remote control, you can easily adjust the brightness of the laser by long pressing the V/H button. Large-capacity and durable battery: Equipped with a large-capacity 3.7V 2400mAh lithium battery, the charging cycle is environmentally friendly and can be easily charged using the charging accessories included. Widely used: With IP4 water and IP5 dust protection level and shock-resistant design, it can be used safely indoors and outdoors. Ideal for home decoration, flooring installation, framing, tiling, hanging pictures, etc.