... 104dB94dB74dB, 84dB, 94dB, 104dB94dBStandard deviation for SPL Smaller than ±0.3 dBSmaller than ±0.5 dBFrequency(Hz)1000Hz1 000Hz, 500Hz, ... , 125Hz1000Hz1 000Hz, 500Hz, 250Hz, 125HzStandard deviation for FrequencySmaller than ±1 %Distortion(THD)≤1 %Power Supplylithium recharge Battery(3 ... adaptor, Hot-wire wind speed sensor, AH40 mini-printer Muti-frequency sound calibrator AWA6223S/F & AWA6224S/F ...