Width x Depth x Height: 55 x 38 x 144mm Frequency Characteristics: A Measurement Range (dB): 30 to 130 Resolution (dB): 0.1 Frequency Range (Hz): 31.5 to 8000 Measurement Accuracy (dB): ± 1.5 (94dB, 1kHz) Frequency Characteristics: A 电源(v):1 x 9V平方干电池(分别出售) 宽度(mm):55 深度(mm):38 电源:1 x 9V平方干燥的电池(单 出售)