FR FDM01 SOUND LEVEL METER Features: Free sensitivity Temperature and humidity detection Light alarm Mobile app intelligent linkage Conforms to International Committee IEC651TYPE2 and American International Standard ANSIS1.4TYPE2 standards Measurement range: 30dB-130dB Accuracy: ±1.5dB A-weighting responses, with fast and slow response rate selection "Automatic shutdown in 15 minutes" function Dual...