Mercury: 600.106UK, Digital Sound Level Decibel Meter, Accuracy ±1.5dB, 0.1dB Resolution, 30-130dB Measurement Range, 31.5Hz-8.5kHz Frequency RangeDigital Sound Level Decibel Meter A high performance digital sound level meter. Ideal for measuring noise levels in offices, industrial environments, airports, public buildings, etc. Complies with EN61326 1: 2013 standard 12. 5mm electret condenser microphone Display with 0. 1dB steps on a 4 digit LCD screen Fast (125ms) and slow (1 sec) time and A and C weighting Maximum and data hold functions Supplied in heavy duty plastic case with windshield