Sound Calibrator Extech 5% Freq Acc

Sound Level Calibrator Output Sound Pressure 94 dB Frequency Accuracy 5 Percent Frequency Source 1 000 Hz Distortion Less Than 2 Percent Compatible with Brand Extech Compatible with Manufacturer Model Number 407730 407730-NIST 407731-KIT 407732 407732-KIT-NIST 407732-NIST 407732-NISTL 407750 407750-NIST 407760 407780A 407780A-NIST 407790A SDL600 SDL600-NIST SL130W SL130W-NIST SL150 SL250W SL400 SL400-NIST Output Sound Accuracy +/-0.5dB Battery Chemistry Alkaline