size, lightweight and portable, easy to take out and carry around with you. Adopts optical glass, fine transmission, with clear laser-light. 2 lines for fine positioning, fine flexibility and stability. Push button design, push to left side to entering into alarm mode, push to right side to it and the laser-level will emit slashline while push to the middle position. Two touching buttons design, one V button, H button, the horizontal line and vertical line with a clear division. If the angle is over 3, the laser-light will keep blinking and also has beep sound to reminding you to reset them on a flat ground. 1/4inch thread size on the bottom for easy connection, it can be used with tripod to adjust the working height of the machine. Powered by 2 AA batteries, you should prepare it by yourself. It is perfect for a of uses, including flooring, tile layout, paneling, wallpapering, stenciling, wainscoting, finish carpentry, wall stud layout and partition installation. Note: The laser-light output maker is located on the output hole. Do not stare directly at the laser-light. Do not disassemble the instrument and internal repairs by yourself. This instrument meets the laser-radiation safety rating standard. Name: Laser-Level Battery: 2 * AA battery (not included) Laser-ray: 2 lines Alarm angle: 3 Type: Vertical & Horizontal Lasers color:As shown Material:plastic size:145 x 105 x 120mm Package Contents: 1 x laser-level 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.