A precision sound level meter ideal for measuring noise levels in different environments and industries 3 manual ranges 30 to 80db 50 to 100db 80db to 130db 01db resolution selectable a or c frequency weightings fast 125ms or slow 1s response filters 35mm lcd display with function indicators lcd display backlight data hold function freezes displayed value max hold displays highest measured value min hold displays lowest measured value overunder range indicator auto power