BTMETER BT-7000A 4-in-1 Decibel Meter 30~130dB, Decibel/Temperature/Humidity Meter with Alarm and USB Cable

[High Accuracy Decibel Meter] This large screen decibel meter Measuring Range: 30~130dBA. Accuracy: ± 1.5 dB. Resolution: 0.1 dB. Sampling Time: 1.0 times/second. The sound level meter is equipped with a large digital LED display.[Real-Time Testing] Supports real-time testing of decibel concentration/temperature/humidity. Three sound sampling rates (fast/medium/slow) meet different sampling requirements. Temperature range: -10.0°C~+50.0°C, Accuracy: +/-1.0°C. Humidity range: 20%~85%, Accuracy: +/- 5%.[Auto Alarm Icons] Time, Decibel, Decibel Bar, Humidity, Smile Temperature and Temperature Face Icons are built into the LED screen. Three colours of smiley face icons temperature indicator and decibel bar indicator highlight the ambient temperature and decibel respectively in real time.[Wall Mount Digital Decibel Meter] Unlike portable sound level meters, this wall mount sound level meter can be mounted on a wall or table and comes with a 1000mAH battery that can be plugged in for long te