Sound Level Meter Type 2 30 to 130 dB dB Range Frequency Range 25 Hz to 10 kHz A C Flat Frequency Weighting Accuracy +/-1.5 dB Resolution 1 dB Display LCD 10 ms 1000 ms 125 ms 35 ms Response Time USB Interface Microphone Type Electret Condenser Microphone Size 1/2 in Standards CE Records Up To 1 024 Data Points Operating Temp Range 14 Degrees to 122 Degrees F Built-In Microphone and Real Time Clock Output Jack Analog USB (4) C-Cell Battery Type