TA8152B Digital Sound Level Meter Noise Meter USB Data Connection LCD Display 40-130dB Tester Volume Decibel Measuring Multifunction: Maximum lock Frequency weighting Time weighting Range selection Communication interface (only TA8152B) Low voltage prompt Auto off AC/DC signal output High precision sensor: Using pure copper electroplating material,equipped with wind-proof and noise-eliminating ball,the measurement is more stable and accurate Hidden bracket Can be connected to the triangle bracket 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 External power supply: AC/DC analog sianal output iack Optional measuring gear 5 gears optional: 40~70dB/60~90dB/80~10dB/I00~130dB/40~130dB USB data connection real-time synchronization: Real-time data sampling and analysis. (TA8152B only) Package included: 1 * TA8152B Host 1 * Packing color box 1 * Cloth bag 1 * English instruction 1 * USB Cable