Bosch GLM 50 C Professional Laser Measure with Bluetooth and Backlit Display (Blue) Whether it's the upgraded backlit color display or Bluetooth technology that's compatible with both Bosch free apps (measure and document and floor plan), this is a laser measure that's ready for anything. The Bosch GLM 50 C packs a lot of functions, including the basics of real-time length, length, area, volume and indirect. All-around soft grip protection on the GLM 50 C helps the device last longer by protecting it from damage. The laser measure's easy-to-use keypad ensures quick operation and the illuminated display provides better readability of measurements. The GLM 50 C can generate up to 10,000 measurements per battery supply. Range is 165 ft./50 meters.