... , environment protection, labor hygiene, transportation, teaching, scientific research. 1.Basic configuration: TL5670B sound level meter, cable, program floppy disk, fan cover, horologe screwdriver ... LR6 batteries with input hole for external powerCalibrator TL6020/TL6020A sound level calibrator Dimensions 310mm×85mm×70mmWeight 680gService environment Temperature: -10°C~+50 ...