GoodsBazaar SL4001 Professional Use Digital Sound Level Noise Decibel Measurement Meter GM1358 Sound Meter

SL-4001 2.2" LCD Digital Sound Level Noise Meter GM 1358 High Precision Bar Graph Professional Digital Sound Level Noise Meter SL 4001 / GM 1358 High Precision Bar Graph Indication 30-130dB with 2.2" Backlight LCD Screen Features: *Wide measurement range: 30~130dBA, 35~130dBC *Accuracy up to 1.5dB *This unit was designed according to following standards: A. International electrician committee standard: IEC PUB 651 TYPE2, B. US national standard: ANSI S1.4 TYPE2 *With modern, compact, portable design. *Easy to use *Frequency weighting characteristic: A & C *Time weighting characteristic: Fast & Slow *AC/DC output *Bar graph indication *Equipped with sponge ball to filter-out unwanted signals. *Max reading hold *Auto power off *Overload indication: OVER/UNDER *Auto backlight display *Low battery indication *Powered by 9V Battery *Approved by CE/ROHS/FCC standard Specifications: *Measuring range: 30dBA~130dBA, 35~130dBC *Accuracy: ±1.5 dB *Frequency range: 31.5Hz~8.5 KHz *Frequency weighting: A/C *Digital Display: 4digits *Resolution: 0.1dB *Measuring level: 30~130, 40~90, 50~100, 60~110, 80~130 *Linearity range: 50dB / 100dB *Sample rate: 2 times/second *AC output: 0.707Vrms at FS output impedance approx. 600 ohm *DC output: 10mV/dB, output impendence approx. 100ohm *Microphone: 1/2 inch Electret condenser microphone *Power supply: 9V Battery *Operating condition: 0~40 10~80%RH *Storage condition: -10~60 10~70%RH *Weight: 194g (including battery) *Dimension: 21x7x3cm Package Included: 1 x Sound level meter 1 x 3.5mm cable (13cm) 1 x English Manual 1 x Case ?