This laser level is widely used for any job that requires straight lines or accurate measurement, such as hanging picture, shelf or air-conditioning installation, building construction, interior decoration, etc. Features: Can project 1 horizontal line and 1 vertical line with single line switch. Magnetic damping compensator to ensure quick self-leveling time. Launch oblique line function, slope locking mode and automatic leveling function. Auto-leveling and laser line will flash if the unit is out of self-leveling range after the lock key is opened. Includes only one button and a lock key, easy to operate and control. Special shake-proof design to avoid vibration while in transport, with 1/4" interface for tripod connection. Perfect for home decoration, installation of the floor, framework, laying of tiles and wall charts, etc. Mini size and light weight for easier operation and carrying. Specifications: Type: With Bracket / Without Bracket (Optional) Laser Beam: 1H1V (Cross Line, Horizontal Line, Vertical Line) Quantity of Laser Diode: Two Light Color: Red Beam Effective Working Range: 15m Wavelength: 630-670nm Laser Power(H/V): 5mw Leveling Accuracy: ±1.5mm at 5m distance, ±3mm at 10m distance Laser Safety Class: Class Ⅱ, Output ≤1mw Material: ABS Auto-leveling Range: 4°±1° Beam Emission Angle(H/V): 130° Self-leveling Time: ＜3s Automatic Leveling Function: Yes Waterproof Level: IP54 Connector Interface: 1/4" Thread Operating Time: 20 Hours Power Supply: 4 * 1.5V AA Batteries(Not Included) Operating Temperature: -10℃ ～ 50℃ Storage Temperature: -25℃ ～ 70℃ Item Size: Approx. 90 * 58 * 85mm / 3.5 * 2.3 * 3.3in Item Weight: Approx. 449g(With Bracket) / 258g (Without Bracket) Package Size: Approx. 24.3 * 11 * 8.6cm / 9.6 * 4.3 * 3.4in(With Bracket) Approx. 12.5 * 10.5 * 7.8cm / 4.9 * 4.1 * 3.1in(Without Bracket) Package Weight: Approx. 605g(With Bracket) / 380g (Without Bracket) Package List: 1 * Laser Level 1 * Protection Bag 1 * User Manual(English)