This is a level instrument, 16 lines for finer positioning, with self-leveling system, flexibility and stability. With vertical and horizontal laserlines, convenience to use. It is perfect for a variety of uses, including flooring, tile layout, paneling, wallpapering, stenciling, wainscoting, finish carpentry, socket and switch layout, wall stud layout and partition installation Features: 16 lines for finer positioning, with self-leveling system, flexibility and stability. Self-leveling function can conquer small rugged place such as 3, over 3 the laser light will keep blinking to remind you to put it on a flat place. Alarm function beyond the safe range. The magnetic-damping compensation system ensures quick levelling time. 1/4" screw size for easy connection, it can be used with tripod to adjust the working height of the machine. A 360 horizontal line can be drawn on the wall. Two vertical lines can be drawn on the wall. Leaning function, it can be applied in a leaning position like upstairs building. Comes with one T-type wall mounting bracket, 7mm wall mounted distance, general for indoor and outdoor use. Three touching buttons design, one OUTDOOR/Open button, one V button, and one H button, the oblique line, horizontal line and vertical line with a clear division. The button is wear resistant, with high sensitive to switch the line mode quickly, and with comfortable hand feeling. Comes with one remote control, A=vertical line, B=horizontal line. Scaning QR code on the back of remote control to download phone APP, convenient to control the level machine. Connect the APP through BT, also has electric quantity display and voice control function. Easy to carry with the case, providing quick and convenient mobility and storage. Note: Please do not let the laser line shoot to your eyes directly. Specifications: Main material: plastics metal Battery: 2 * 3.7V, 3000mAh battery(included, you will find there are two 18650 batteries inside if disassemble one) Laser ray: 360* 4, 16 lines(40) Wavelength: Green light 532nm Horizontal/vertical accuracy: 0.2mm/10m Self-levelling-range: 3 Waterproof grade: IP54 Working-range: about 25m in diameter Working time: about 5 hours Green light working temperature: -5 to50