Model: TDJ834 - Quantity: 1 - Color: White - Material: ABS - Calibration sound source: 94dB at 1KHz - Measurement range: 30~130dB 35~130dBC - Accuracy: +/- 1.5dB (reference sound pressure standard 94dB at 1KHz) - Frequency response: 31.5Hz~8.5KHz - Resolution: 0.1dB - Measuring level: 30~80 40~90 50~100 60~110 70~120 80~130 30~130(dB) - Dynamic range: 50dB/100dB - Overload indication: use the symbol OVER and UNDER for indication - Frequency weighting characteristic: A and C - Digital display: 4 digits - Analogy bar graph: 1dB/1bar graph - Sampling rate: 20 times / second - AC signal output: 0.707Vrms/full bar graph output impedance is about 600ohm - DC signal output: 10mV/dB output impedance is about 100ohm - Dynamic characteristic: Fast (high speed) / Slow (low speed) - Calendar accuracy: +/- 30 seconds / day - Data storage quantity: 43690 (special user may expand to 131070) - Microphone: 1/2 inch polarization capacitance microphone - Operating voltage: 6F22 9V - Battery life: 20H continuous use - Display: 2.2" LCD - Come with USB cable to connect to computer - Packing list: - 1 x Sound level meter - 1 x USB cable (length: 80cm) - 1 x Chinese user manual - 1 x English user manual - 1 x CD - 1 x 6F22 battery - 1 x Case