Sound Level Meter, Includes 9V Battery, Instructions, Digital Display Screen Type LCD, Frequency Weighting C, Maximum Frequency Measurement 4 kHz, Maximum Sound Level Measurement 130 dB, Minimum Frequency Measurement 31.5 Hz, Minimum Sound Level Measurement 40 dB, Sound Level Measurement Accuracy +/-3.5 dB, Sound Level Measurement Resolution 0.1 dB, Product Type Sound Level Meter, Response Time Fast, Manufacturer Warranty Length 1 yr, Battery Size 9V, Batteries Included Yes, Battery Voltage 9V WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -