Model: 525A Measuring range: 30-130db Frequency range:31.5hz-8.5khz Response time:fast Microphone:6mm capacitance microphone Power supply;DC5V 1A micro USB outlet Operating condition: 0-40 degree Dimension:210x130x28mm Weight: 453g Features and Functions: 1. Accuracty: + -1.5dB In Standard audio: 94dB 1 khz 2. Measurement Range: 30 - 130dB 3. Frequency Response Range: 31.5 hz - 8.5 khz 4. Frequency weighting: A (Environmental Noise) of Weighting 5. Fast answerSpecification: Package Weight One Package Weight 0.65kgs / 1.44lb One Package Size 21cm * 13cm * 3cm / 8.27inch * 5.12inch * 1.18inch Qty per Carton 20 Carton Weight 14.50kgs / 31.97lb Carton Size 62cm * 47cm * 35cm / 24.41inch * 18.5inch * 13.78inch Loading Container 20GP: 261 cartons * 20 pcs = 5220 pcs40HQ: 606 cartons * 20 pcs = 12120 pcs