?Advanced with Bluetooth Connection?: The Noise Decibel meter is compatible with Android and iOS smartphone for data recording via the dB Tester app, allowing unlimited data transfer and management ?Powerful Data logger ?This portable sound level meter itself can store over 20,000 groups measurement data, and also can be connected to your smartphone to check the real-time recording or export the historical data for fully analysis ?High Accuracy?The measuring range of the decibel meter sound level reader is from 30dB to 130dB .Highly accurate with 1.5 dB. Real-time monitoring can give you accurate data on the sound level in the area ?Multi-Functional?4-digit LCD display with a resolution of 0.1 dB. Features with a Large screen makes the sound meter, noise decibel reader easy to use in dark condition. Backlit Alarms, MAX / MIN and data hold function such versatility gives you a great experience of use ?Easy-to-Use?The db meter equipped with a 1/4"" mount thread for taking sound level measurements in various environments. Making it easy to carry and operate for extended periods without muscle fatigue