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. Square and compact by design, the BLAZE GLM 20 laser measure is ready for anywhere portability. It has a back-lit 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 inches, and press again to hold the measurement. Fits comfortably in hand and easily in pocketBlue and blackSmart and convenient size and shape - easily portable and will rest on any flat surfaceBacklit display offers easy and convenient viewing, even in dark areasPrecise laser measure technology - accurate to 1/8 InReal-time measurement mode - walk-off measurements from the wall and other surfacesSimple one-button operation - press button once to begin measuring in real-time measurement mode, press button again to hold measurementOperating temperature 1 - 14 degrees F / -10 degrees C up to 104 degrees F / 40 degrees CIncludes 2 AAA batteriesPlastic