Sound level meter Sound level meter series Application :used to test the sound level of environment , mechanic, vehicle, ship and other noise .Fit for industry , enviromental protecting , working , sanitation, teaching research and other departments. Tr-5868p / tr-5858/tr-5866/tr-5826 Standard :gb/t3785, iec651 type2, ansis1.4type 2 . Measuring range : Lp : A : 30-130db / l:35-100db h:80-130db C ; 35-130db Line:40-130db / 35-130db Ln:0-100% Dc output : 10mv=1db resolution: 0.1db. Accuracy:1db.Lcd display, Power supply :4*1.5vaaa battery / 1*9v6f22 battery /4*1.5vaa battery Dimensions : 236*63*26mm / 195*72*31mm / 233*68*32mm Weight(not including battery) 170g/195g/158g/175g