4 X 360° Green Laser Lines? Laser Level have 2 horizontal 360° plane, two vertical 360° planes, 16 laser lines, which can cover the floor, walls and ceiling all around the room. Horizontal lines and vertical lines cross at 90°angles help you to visualize quickly and finish square layout. The portable size makes it more comfortable and convenient to use, even for small handmade project. Self-Leveling and Manual Mode? This 4D self leveling laser level can be tilted self-leveling within ± 3°, and the alarm will be activated until we put it in a level place. It will also provide a solution if you need tilt lines-Manual Mode. The device can be used at any angle in manual mode. This laser level self leveling is equipped with a remote control, save time and energy, more convenient and fast. It can make construction sites more accurate and efficient. Laser level uses a high-precision and stable high intensity green laser transmitter which makes the laser line more precise, brighter and goes further. It can be used indoors or outdoors. Two Batteries & Charging? This laser level comes with 2 2400mAh batteries for convenient replacement and continuous use. When the battery is exhausted, you can directly plug in the charger and the laser level can be used normally. 1mm at 7m (1/25 at23ft). Number of Laser Lines. Rechargeable 18650 lithium battery 2400mAh 2. 1 x16-line Laser Level. 1 x Battery Charger. 1 x Wall Bracket. 1 x Upper Wall Chuck. 1 x Lift Table. 1 x Remote Control.