The first box laser on the market to integrate a power tool battery increasing the versatility and usage in conjunction with other tools in the range. Increased accuracy over manual methods with levels of 0.2 mm per meter. Automatic levelling to ±. 0.2 mm per meter increases speed and accuracy. High strength magnets located on the rear of the unit for use with metal stud work and tracking. Out of level indicator: laser dot will blink to demonstrate that it is out of level by ±. 4 degrees. Easy use one button operation. Flexible battery system: works with all Milwaukee© M12™ batteries . Supplied with a carrying pouch