Laser distance measuring device from Bosch Professional GLM40

Laser diode: 635 nanometer, < 1 milliwatt Measurement range: 0.15 – 40.00 Approximate weight: 0.09 kg Typical measurement time: < 0.5 seconds Measurement range, from: 0.15 meter Measurement range, to: 40 meters Laser class: 2 Method of calculating measurement accuracy: +/- 1.5 mm Maximum measurement duration: 4 seconds Power supply: 2 batteries × 1.5 volt LR03 (AAA)