• High precision sensor using pure copper electroplating material, equipped with a windproof and noise-eliminating ball, the measurement is more stable and accurate
• Multiple measurement functions, frequency weighting A is the amount of noise perceived by the human ear; frequency weighting C is the characteristic of mechanical noise
• Optional measuring gear, 5-gears optional: 40~70dB/60~90dB/80~110dB/100~130dB/40~130dB
• With a hidden bracket design, convenient to use

Specification:

• Microphone: 1/2-inch condenser microphone
• Accuracy: ±2dB
• Frequency response: 31.5Hz-8.5KHz
• Dynamic range: 30dB
• Measurement range: 40-130dBA/40~130dBC
• Frequency weighting: A and C features
• Digit display: 4 digits, resolution 0.1dB, sampling rate 2 times/sec
• Analog scale display: 1 scale represents 1dB, sampling rate 2 times/sec
• Measurement gear: 40~70dB/60~90dB/80~110dB/100~130dB/40~130dB 
• Overload Identifies: OVER, HI, UNDER, LO symbols indicate 
• AC signal output: 0.707Vrms/For each full scale, the output impedance is about 600Q
• Dynamic characteristics: FAST/SLOW and the response rate
• Maximum lock: Max
• Self-test time: about 4 seconds
• Power supply: 1 x 6F22 9V battery or DC 9V 100mA DC power supply (battery not included)
• Working environment: 0-40℃, 10-70%RH
• Storage environment: -10-50℃, 10-80%RH
• Size: 235x70x30mm
• Weight: about 380g