Laser Detector quickly and accurately locates any laser signal emitted from rotary lasers. Clamp attaches to leveling staffs or grade rods. Dust and water resistant. Front and Back Display: Front only, Battery Included: Yes, Dimensions L x W x H (in.): 6 5/8 x 2 11/16 x 1, Range (ft.): 393, Backlit Display: Yes, Mount Type: Rod mount, Detection Setting Type: Fine, coarse, Laser Type: Visible and invisible laser, Grade: IP67: Sealed for waterproof and dustproof rating, Auto Shutdown: Yes, Indoor/Outdoor Use: Outdoor, Mount Bracket Included: Yes, clamp, Accuracy: Fine: ±0.039 coarse: ±0.098, Compatible Tool: Rotary laser level, Indicator Type: Visual and audible, Battery Type: 9 Volt