3-in-1 Decibel Meter Sound Level Reader + Humidity & Temperature

【Convenient Charging】The decibel meter is powered by a built-in 2000mAh Li-ion battery, comes with a 9.9-foot USB charging cable, and the plug is included in the package, so you don't need to look for another plug to charge it. You can do it anytime and anywhere. [The product is calibrated and tested and sent out, usually out of the box the battery is in a non-full state, please connect the charger to keep it fully charged before turning it on and using it.] 【Accurate Precision】This sound level meter uses a smart air semiconductor sensor to test decibel temperature and humidity values. It is more sensitive, accurate and stable compared to ordinary sensors. Measuring range is 30~130dB, accuracy: ±1.5dB, frequency response range: 50Hz~8.5KHz: Frequency response range: 50Hz~8.5KHz; Humidity range: 20~85%, accuracy: ±5%; Temperature range: 14~122℉, accuracy: ±5%. [Attention! Due to different environments, the actual measured value has 0~15% deviation, which is normal range]. 【Easy to operate】Diemmern Smart Decibel Meter is ready to use, click ▲ to enhance the brightness, click ▼ to reduce the brightness. The Diemmern Large LED Display Decibel Meter can be hung on the wall or put on a table, suitable for testing classrooms, studios, traffic avenues, factories, construction sites, homes, offices and other places. It is the ideal noise meter.