Cross Line Lasers level X202 Laser model 1H1V Wave length 635nm Working range 10m-50m ... for any slope Match the detector, extend the using distance Specification: Irradiating laser1H1VWave length635nmWorking rangeindoor working radius about 10 ... pcs of 5# BatteryPackingAluminum PackagingStandard configuration:Manual,Dry battery,Laser glasses,Target,User manualOptional configuration:Receiver,Tripod