1、Self leveling when tilt angle is not over 3 degree. 2、Automatically alarm (laser flashing, buzzer beeping) when the self leveling range is exceeded. 3、Magnetic damping compensation system ensures fast leveling time. 4、Laser point to the ground for machine positioning. 5、Horizontal / vertical / cross lines measurement. Features:1. Self leveling when tilt angle is not over 3 degree.2. Automatically alarm (laser flashing, buzzer beeping) when the self leveling range is exceeded.3. Magnetic damping compensation system ensures fast leveling time.4. Laser point to the ground for machine positioning.5. Horizontal / vertical / cross lines measurement.6. 360 degree rotatable base with fine-tuning components makes the machine quickly finds the target.7. Can be used with a tripod to adjust the height of the laser spirit level.8. Using semiconductor laser tubes with a wavelength of 650nm, the laser lines are clear and bright. Specification:Line color: GreenMaterial: ABS housingLaser wavelength: 650nmBag size: 21 x 16 x 23cm / 8.2 x 6.3 x 9.0inPackage weight: Approx. 1372g/48.4oz Package list:1 x Laser Spirit Level1 x Green Light Eyeglasses2 x Lithium Battery1 x Power Adapter1 x Battery Charging Cable1 x Black Bag1 x User Manual Note: