UNI-T UT353BT Mini Sound Level Meter Digital Bluetooth Noise Meter Tester BR2403

 This meter is featured with wide measuring range (30-130dB), which could connect your phone by Bluetooth. It can be widely used for monitoring sound level in homes, office, schools, factories, construction site, etc.    Features:  Built-in Bluetooth system, can export the data by Bluetooth.  LCD display with backlight, easy for reading.  Wide measurement range from 30dB to 130dB.  Measuring unit is switchable: Fast or Slow.  Includes data storage and data transmission function.  With maximum and minimum value measurement.  Equipped with sponge ball.  Low battery indication, automatic & manual power off function.  Compact and light, convenient to hold and carry.  Specifications:  Brand Name: UNI-T  Color: Red  Material: ABS Plastic  Display: LCD Display  Measuring Range: 30?130dB  Accuracy: ±1.5dB  Resolution: 0.1dB  Frequency Response: 31.5Hz to 8KHz  Sampling Rate: 125ms(fast mode) / 1s(slow mode)  Operating Temperature: 23°C±5°C(<=80%RH)  Storage Temperature: -20?60°C(<=80%RH)  Overload Indication: OL  Auto Power Off: 5min  Altitude: Max.2000m  Power Supply: 3 * 1.5V AAA Batteries(Included)  Operation System: Andriod 4.3, ios 8.4, Bluetooth 4.0 or more  Item Size: Approx. 15 * 5.1 * 2.7cm / 5.9 * 2 * 1.1in  Item Weight: Approx. 80g / 2.8oz