Pyle PSPL25 Digital Handheld Sound Level Meter with A and C Frequency Weighting for Musicians and Sound Audio Professionals Max Hold and Data Hold Function - Frequency Weighting: A and C Type - Storage Humidity: 10 to 75% RH Auto Power Off - Time Weighting: Fast, Slow - Battery Type: 9V (Included) Level Range: Low - 30-100dB, High - 60-130dB - Operation Temperature: 0 to 40C (32 to 104 F) - Dimensions: 9.06'' H x 2.17'' W x 2.17'' D Accuracy: +/- 1.5dB (ref. 94dB @ 1kHz) - Operation Humidity: 10 to 90% RH - Weight: 7.20 oz. Frequency Range: 31.5 Hz to 8 kHz - Storage Temperature: -10 to 60 C (14 to 140 F)