Laser class2 <br/>Wavelength635 nm <br/>Light output< 1 mW <br/>Measurement range0.2 - 30 m // 0.7 - 98 ft <br/>Measuring accuracy± 3 mm / ± 1/8 " <br/>Number of measurements per battery charge5000 <br/>Protection type IPIP 54 <br/>Weight (with batteries)0.1 kg / 0.22 lbs <br/>Laser functionsLength / Area / Volume / Continuous measurement (tracking)