1、Using high‑sensitivity sensor, quick response and high measurement accuracy. 2、Hand‑held sound level meter, compact and light, suitable for field measurement. 3、Support backlight display, can easily read measurement data in strong light and night. 4、Equipped with condenser microphone, convenient measurement and simple operation. 5、It can measure and monitor the sound quality, suitable for homes, residential areas, schools, etc. .Condition: 100% Brand New Item Type: Sound Level Meter Material: Plastic Model: HT622 Type: HT622A, HT622B (Optional) Battery: 3 x AAA Battery (Battery Not Included) Product Size: Approx. 189x60x33mm / 7.4x2.4x1.3in Type (Optional) HT622A HT622B Sound Pressure Accuracy ±1.5dB (standard sound pressure, 94dB at 1KHz), ± 5dB (standard sound pressure, 94dB at 8KHz) ±1.5dB (standard sound pressure, 94dB at 1KHz), ± 5dB (standard sound pressure, 94dB at 8KHz) Sound Pressure Frequency Response 30Hz-8KHz 30Hz-8KHz Sound Pressure Dynamic Range 50dB (each measurement gear) 50dB (each measurement gear) Sound Pressure Measurement Range 30-130dBA, 35-130dBC 30-130dBA Sound Pressure Frequency Weighted Characteristics A weighted A and C weighted Sound Pressure Dynamic Characteristics FATS 125ms, SLOW 1sec FATS 125ms, SLOW 1sec Microphone Polarized condenser microphone Polarized condenser microphone Measuring Range 30-80dB, 40-90dB, 50-100dB, 60-110dB, 70-120dB, 80-130dB 30-130dB 1 x Sound Level Meter (Battery Not Included) 1 x Storage Bag 1 x Manual