Sound Level Meter, 1.Resolution:0.1, 2.STANDARD:GB/T3785, IEC651 Type2 3.DETECTION CHARACTERISTICS: FAST/SLOW. Sound Level MeterSTANDARD:GB/T3785, IEC651 Type2SOUND LEVEL: 30~130dBRESOLUTION:0.1ACCURACY:±1dBWEIGHTING: ADETECTION CHARACTERISTICS: FAST/SLOWPOWER SUPPLY:9V 6F22 BATTERYDIMENSION:195X71X32mm Sound Level Meter