Using the Bosch BLAZE GLM 20 laser measure is a piece of cake. First, insert the two AAA batteries that come with it. Once the batteries are in, aim the laser at the object or surface you want to measure. Press the single button on the device to start real - time measurement. As you move around, the display will show the changing measurements. When you've got the measurement you need, press the button again to hold that value.
When using it, make sure the laser has a clear line of sight to the target. Avoid using it in direct sunlight or in very foggy conditions as this can affect the accuracy.
For maintenance, keep the device clean. You can use a soft, dry cloth to wipe it down. Don't expose it to extreme temperatures or moisture. If you're not going to use it for a long time, remove the batteries to prevent leakage.