The Roughneck P20 Laser Distance Measure has a compact design and a soft grip rubber case that prevents slipping during measurements Made with Leicas M3i chipset to provide reliable accurate measurements Simple one button operation measures distance in metric mmcmm or imperial inchesfeet The inverted display provides improved visibility in bright light Specification Range 021-20m 814in - 65ft Accuracy ± 3mm Smallest Unit Displayed 1mm 116in Laser Class Class 2 635nm <1mW Auto Power Off After 120 seconds Continuous Measuring Yes Operating Temperature 0 to 40°C Power 2 x AAA batteries supplied Weight without batteries 805g