1. Accuracy: +-1.5dB(based on the standard sound source 94dB@1KHz)2. Frequency response range: 31.5Hz～8.5KHz3. Dynamic state range: 50dB 4. Measuring range: 30~130dBA，35~130dBC5. Frequency weighting character : A weight and C weight 6. Numerical digit display: 4 digits,resolution 0.1dB, sampling frequency 2 times/second7. Dynamic scale display: 1 scale equals 2dB or 1dB, sampling frequency 2 times/second8. Dynamic scale shift: 30~130dB, 30~80dB, 50~100dB, 80~130dB 9. Overload display: "OVER"and"UNDER in display screen 10. AC signal output: 0.65Vrms for each shift and full scale, the output of impedance around 600ohm 11. DC signal output: 10mV/dB, the output of impendance around 100ohm 12. Dynamic character: Two choices of reaction rate "FAST" and "SLOW" 13. Microphone: 6mm capacitor microphone 14. Max locking: MAX 15. Battery: 3×1.5V AAA (not included) 16. Working temperature and humidity : 0 C~40C，10%～80% RH 17. Storage temperature and humidity: -10C~60C, 10%~70%RHSpecification: Package Weight One Package Weight 0.40kgs / 0.89lb One Package Size 25cm * 10cm * 5cm / 9.84inch * 3.94inch * 1.97inch Qty per Carton 74 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 74 pcs = 13098 pcs40HQ: 412 cartons * 74 pcs = 30488 pcs