Sound Level Meter Sensitive Accurate Measurement Quick Response LCD Backlit Noise Tester Black Item Type: Sound Level Meter Material: ABS Color: Black Measuring Range: 30-130dBA Accuracy: ± 1.5dB Accuracy: ± 1.5dB (at the reference sound pressure level, 94dB at 1kHz ) Resolution: 0.1dB Environment Temperature Range: 0 to 60℃ Temperature Accuracy: ± 2℃ Noise Display: Four digit display, maximum 1999 Frequency Response: 125Hz to 8kHz Analog Bar: 1 scale represents 2dB Overload: OVER, Hi, UNDER, LO Microphone: Highly sensitive 1/2 inch condenser microphone Time Weight: FAST 0.125 seconds, SLOW 1 second Sampling Rate: 2 times/second Automatic Shutdown: 10 minutes (can be closed manually) Operating Environment: - 10 to 50℃, maximum 80% relative humidity, indoor altitude less than Approx. 2000m / 6561.7ft Storage Environment: - 10 to 50℃, maximum 70% relative humidity (take out the battery) Display Size: Approx. 37 x 41mm / 1.46 x 1.61in Power Supply: 1. 5V AAA battery x 3 (without battery)