This sound level meter complies with IEC651 Type 2 and ANSI S1.4 Type 2. <br />● With the measuring scope from 30 to 130 dB and automatic shifting function <br />● A and C weighting network selection <br />● High speed (FAST)/Low speed (SLOW) response rate selection<br />● Maximum (MAX) locking function <br />● Digital display， good anti-interference performance， power saving <br />● With the backlight feature， it is appropriate for gathering the sound data at night. To save power， backlight auto power off function is provided. <br />● Composite material injection molding process is adopted for casing with anti-drop structure design. It is not only extremely wear-resisting， but also elegant. <br />● With power saving and high-reliability circuit design， well-designed high-efficiency power supply circuit makes the batteries more durable. <br />specification<br />● Sound pressure accuracy: ± 1.5 dB (sound pressure standard， 94 dB @ 1KHz). <br />● Sound pressure accuracy: ±5 dB (sound pressure standard， 94 dB @ 8KHz).<br />● Sound pressure frequency response: 30Hz - 8KHz. <br />● Dynamic range of sound pressure: 50 dB (for each measurement gear level). <br />● Sound pressure measurement scope: 30-130 dB A， 35-130 dB C. <br />● Sound pressure frequency weighting characteristics: A and C characteristics. <br />● Dynamic characteristic of sound pressure: FAST 125ms， SLOW 1sec <br />● Microphone: polarized capacitive microphone. <br />● Digital display: 4-digit， resolution: 0.1 dB， sampling rate: 2 times/sec. <br />● Analog bar display: Each analog bar represents 1 dB， sampling rate is 20 times/sec. <br />● Measurement gear level: 30-80 dB， 40-90 dB， 50-100 dB， 60—110 dB， 70—120 dB， 80-130 dB， 6 gear levels in total. <br />● Automatic shifting gear level: microcomputer will automatically select the best gear level in the range from 30 to 130 dB. <br />● Below or above limit prompt: indicated with "UNDER” or "OVER” display. <br />GENERAL<br />Power Supply  4x1.5V AAA Batteries<br />Product Size  184mm×60mm×29mm(7.2”x2.4”x1.1”)<br />Product Weight  190g(0.41lb)<br />Category  CE<br /><br />Package list: <br />sound level meter* 1<br />English manual * 1<br />Meter Bag * 1<br />Color box packaging<br /><br /><img src="http://img6.eachbuyer.com/x9/p100/eb5392_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5392_5.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5392_6.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5392_7.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5392_8.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5392_9.jpg" />