Features:  ★ Self-leveling mode & manual mode-You can set 2 modes Cross-line laser with slide switch. Self-leveling mode, functioning in leveling and compensation range: can be self-leveling if tilted below 4 ° ± 1 °, 4 °. If you tilt more than 4 degrees, the laser level will issue a warning. In manual mode, the self-leveling feature is disabled and the cloth is locked to use the device at any angle.  ★ Laser level of professional laser head is more accurate-The latest version is equipped with a professional grade laser head for adjusting horizontal / vertical laser which is more accurate and stable than other common equipment.  ★ 4 Feet Crash Proof Laser Level & Hands Free Working-IP54 Protection Class (Splash and Dustproof), Shockproof Housing, provides 4 Feet Crash Proof ideal for construction site work. It is also possible to attach the device (sold separately) using a magnetic rotation bracket (sold separately) or using screws for a 1/4 'tripod mount. Provides hands-free operation.  ★ High visibility and accuracy line laser-Two powerful cross line lasers, the laser line is clear and sharp and easily project bright redIcross line at 110 ° wide angle to help your leveling work You Horizontal line accuracy: ± 2 mm / 10 m (one direction) Vertical line accuracy: ± 2 mm / 5 m (one direction). Range: 15 meters. Self-leveling slope: 110 degrees.     Specification:  Laser: Red Beams.  Laser Class: Class 2 (IEC/EN60825-1/2007) <1mW power output.  Laser Wavelength: 635nm.  Leveling Accuracy: ±1/8 In.  Leveling/Compensation Range: 4°±1°.  Working distance (line): horizontal line 33Ft (10m) / vertical line 16.5Ft (5m).  Handle Material: ABS+TPR Rubber.  Protection level: IP54.  Batteries: 2 AA batteries required. (not included).     Package includes:  1 X Laser Level.  1 X Canvas Carry Case