This is a kind of fine quality level instrument, 4D 16 lines for finer positioning, with self-leveling system, flexibility and stability. With vertical and horizontal laser lines, convenience to use. Comes with one extension bar, which is made of thicken aluminum alloy material, 3-heights adjustable, suitable to most of laser level with 5/8" interface. It is perfect for a variety of uses, including flooring, tile layout, paneling, wallpapering, stenciling, wainscoting, finish carpentry, wall stud layout and partition installation. You can have a try.    Features:  4D 16 lines for finer positioning, with self-leveling system, flexibility and stability.  Adopts optical glass, fine transmission, with clear laser light.  Push button design, push left to open it, push right to close it.  Equipped with self-test calibration function, ≤3° automatic leveling, but if the angle is over 3°, the laser light will keep blinking and also has beep sound to reminding you to reset them on a flat ground.  Equipped with LED display, with battery remaining electricity display function for you to recharge the battery in time.  The magnetic-damping compensation system ensures quick leveling time.  Three touching buttons design, one OUTDOOR/Open button, one V button, and one H button, the slashline, horizontal line and vertical line with a clear division.(OUT= slashline)  1/4" thread size on the bottom for easy connection, it can be used with tripod to adjust the working height of the machine.  The T-shape bracket has 360° rotatable base, and equipped with fine adjustment mechanism, can make the machine quickly find the target(1/4" screw size).  With 7mm wall mounted distance, general for indoor and outdoor use.  The bracket also has 360° rotatable base, and equipped with fine adjustment mechanism, can make the machine quickly find the target.  Comes with one remote control, A=vertical line, B=horizontal line.  The button is wear resistant, with high sensitive to switch the line mode quickly, and with comfortable hand feeling.  1/4" to 5/8" thread adapter for easy connection, it can be used with 5/8" thread tripod to adjust the working height of the machine.  Easy to carry with the carrying bag, providing quick and convenient mobility and storage.    Extension Bar:  Made of thicken aluminium alloy material, firm with fine load-bearing, not easy to deformed and not easy to break.  Three heights adjustable, you can adjust according to your demands easily.  Equipped with bubble-level to help you to check whether the tripod is horizontal or not.  Equipped with rocking bar to adjust to height of the tripod, smooth and effort saving.  With fixed plectrum to control to extend length to lock it tightly.  Suitable to most of laser level with 5/8" interface.    Note:  The laser output maker is located on the output hole.  Do not stare directly at the laser light.  Do not disassemble the instrument and perform internal repairs by yourself.  This instrument meets the laser radiation safety rating standard.