Wavelength:635nm Size:9*19cm/3.54*7.48in(D*H) Precision:±1mm/5m ModelNumber:E1303-1 Laserpower::!#!lt!*!5mW OperatingTemperature::-10~40°C PowerSupply::3*AAAlkalineBatteries(notincluded) Self-levelingtime::!#!lt!*!5s(magneticdamping) BrandName:Seeedshed