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: 5 cm Height unit: 13.5 cm Width unit: 22.5 cm Weight unit: 178 g Material: ABS Physical properties Display type: LCD Backlight: Yes Technical data Auto shut-off: Yes Frequency rating range: 31.5 Hz-8 kHz Data-hold function: Yes Microphone type: 1/2" electret condenser microphone Accuracy: ± 1.4 dB Frequency weighting: A, C Windscreen: Yes Environmental data Operating temperature range: -20-60 °C Storage temperature: -20-60 °C Humidity: 90 % Sound level range: 30-130 dB Operational properties Auto shut-off time: 15 s Operating system: Windows Power supply Batteries included: Yes Battery required: Yes Number of batteries: 1 Battery operated: Yes Battery voltage rating: 9 V Battery composition: Zinc-Carbon (ZnC) Battery IEC size: 6F22 (EN)