Spectra Precision HR320 Laser Detector -  Large easy to real LCD on front and rear makes it ideal for exterior applications - Snap in rod clamp allows fast switching from rod-mounted to handheld applications. - Rugged waterproof 5ft (1.5m) drops and protect the unit from moisture and dust.  - Two on-grade sensitivities (fine and medium) let you get to grade faster in a variety of applications. - 100 db loud speaker can be easily heard on noisy job sites. - C59 rod clamp included.