1. 4D 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. 2. Alarm function beyond the safe range. The magnetic-damping compensation system ensures quick levelling time. 360 rotatable base, and equipped with fine adjustment mechanism, can make the machine quickly find the target. 3. 1/4inch 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 . Two vertical lines can be drawn . Leaning function, it can be applied in a leaning position like upstairs building. 4. With 7mm distance, general for indoor and outdoor use. Three touching buttons design, one OUTDOOR/Open button, one V button, H button, the slashline, horizontal line and vertical line with a clear division.(OUT= slashline). Comes with one remote control, A=vertical line, B=horizontal line. 5. The button is wear resistant, with high sensitive to switch mode quickly, and with comfortable hand feeling. Easy to carry with the case, providing quick and convenient mobility and storage. Note: Please do not let the laser-line to your eyes directly. Name: Laser-Level Battery: 2 * , 3.7V, 1500mAh (included) Laser-ray: 360*4, 16lines(40) Display: LED display 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 to 50 Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on.Voltage: AC100-240V Measurement Model: 16 Lines color:As shown Material:plastic size:235 x 210 x 160mm Package Contents: 1 x Level 1 x Wall Bracket 1 x lifting platform 1 x base 1 x remote control 1 x cloth bag 1 x battery 1 x Adapter head 1 x Chuck 1 x cloth bag 1 x charger 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.