Features: 1) Rotary head can be rotated by 360 degrees continuously 2) To control the bottom screw, the rotary laser can be adjusted to the horizontal 3) Laser class: class 2 4) Output power: ≤1mw 5) Power: 4 x 1.5V AA size batteries Features: 1) Rotary head can be rotated by 360 degrees continuously 2) To control the bottom screw, the rotary laser can be adjusted to the horizontal 3) Laser class: class 2 4) Output power: ≤1mw 5) Power: 4 x 1.5V AA size batteries