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Brief Description: RISEPRO(R) is a portable, easy to use and handy instrument for sound quality measuring, monitoring and controlling in office, home, school, traffic, audio system and construction site. The meter has wide range of applications such as noise pollution studies, research and other industrial use. Specifications: Range: 30 ~ 130 dB Liquid crystal display: 3 Digits and a half Response Time : 0.5 second Resolution: 0.1 dB Precision: ±1.5 dB (under the reference condition of 94dB and 114dB, 1KHz) Data Hold, Max, Min and Auto Power Off (About 16 minutes with no key operation) Frequency Range: 31.5 Hz ~ 8 kHz Sound Level: A-Sound level weight Microphone: 1/2 inch polarization capacitance microphone Backlit display Power Supply: one 9V battery Power Life: about 50 hours (alkaline battery) Operating Temperature: 0 ~ 50 ˚C Operating Humidity: 10 ~ 80 % R.H. Storage Temperature: -10 ~ 60 ˚C Storage Humidity: 10 ~ 75 % R.H. Dimensions: 206.2 x 56 x 45.7mm Weight: approx. 110 g (without battery) One Set Included 1 x Sound Level Meter 1 x Sponge Ball / Windscreen 1 x Instruction Manual 1 x 9V battery Color gift box