Product Name: Laser Level Projection: 16 Green Laser Lines Laser Class: Class 2 (IEC/EN60825-1/2014), <1mW power output Laser Wavelength: Osram 520nm Horizontal / Vertical Accuracy: ±3mm/10m;±1/9 In. at 33 Ft. Leveling / Compensation Range: 4°±1° Leveling Time: ≤3s Working Distance: 10m-20m Mount Size: 1/4"-20 Operating Temperature: Between -10℃ and +50℃ Storage temperature: Between -20℃ and +70℃ Products Include: 1x Laser Level 10Short press H and V buttons on the keypad to switch the Horizontal and Vertical laser lines separately.The laser lines can be selected separately according to job requirements.The remote control enables to select three 360° laser lines individually at a distance up to 33Ft. The laser line(s) can be temporarily turned OFF by the remote control when you need to leave for a while. Laser Beam: Green Beam Self-leveling mode: Once the pendulum unlocked, self-leveling mode is enabled. The laser beam will beep as well as the laser beam blinks fast when the tool is out of the self-leveling range ±4°. Manual mode: When the pendulum locked, the laser tool can be placed for use at any angle. The laser beam will blink every 3-5 seconds to remind you it's not self-leveling now.