The Bosch blaze GLM 20 laser measure is an easier, faster and more accurate way to measure. It delivers laser precision technology and real time measurement mode, taking instant and reliable measurements up to 65 Feet, so one person can size up the job in seconds. The BLAZE GLM 20 laser measure is ready for anywhere portability. It has a backlit display for easy viewing, even in dark areas. The laser measure is simple to operate, so users need only press one button to get accurate measurements to within 1/8 Inch and press again to hold the measurement. Class IIa laser product, <1mW power output.