Our sound meters are only suitable for indicative measurements. They do not comply with the IEC 61672-1 (electroacoustics) standard and therefore cannot be used for official measurements. Product basic info Primary colours: Black, White Depth unit: 9 cm Height unit: 29 cm Width unit: 36 cm Weight unit: 258 g Material: ABS Physical properties Display type: LCD Backlight: Yes Dynamic range: 50 dB Technical data Auto shut-off: Yes Frequency rating range: 31.5 Hz-8 kHz Sampling resolution: 2 x / s Data-hold function: Yes Microphone type: 1/2" electret condenser microphone Accuracy: ± 1.4 dB Frequency weighting: A, C Time weighting: Fast 125ms, Slow 1s Windscreen: Yes Environmental data Operating temperature range: -20-60 °C Storage temperature: -20-60 °C Humidity: 10-90 % Sound level range: 30-130 dB Operational properties Maximum working time: 11 h Operating system: Windows Maximum operating altitude: IT connections Interface type: USB Power supply Batteries included: Yes Battery required: Yes Number of batteries: 1 Battery operated: Yes Battery voltage rating: 9 V Battery composition: Zincâ€"Carbon (ZnC) Battery IEC size: 6F22 (EN)