【Jalleria 16 Lines 4D Green Laser Level】 The laser level produces 16 laser lines, 8 horizontal lines, 8 vertical lines and 10 cross lines and can be easily installed on the floor, ceiling, etc. for plastering work. The laser line can be changed according to the work needs. It can be used as a laser level for multiple purposes. 【Always Visible. Indoor and Outdoor Use: Our optical laser level meter provides excellent light transmission and a clear laser line; there are five brightness levels available. The light, brightness and thickness of the laser can be adjusted according to the brightness of the environment. The light is brighter in the sun and thinner in the dark, which protects the eyes and ensures the accuracy of the light. 【Automatic and Manual Leveling Mode】 Automatic Leveling Mode: After setting, the automatic leveling mode is enabled by default. If the device is outside the self-leveling range (4 degrees), the laser beams will flash quickly. Manual/Tilt Mode: After power on,