Check the listing for details. Sper Scientific 840005 Sound Meter. Condition: Used. Listed at 9.99 USD. Welcome! Be sure to check out our other auctions, and don't forget to look at my store items for wrenches and sockets that can be shipped with most auction purchases for no additional cost. Sper Scientific 840005 Sound MeterSmall hand-held unit can be used to measure sound levels anywhere: • Measure sound levels in the workplace. • Quality control for sound level inspection of products. • Environmental noise pollution. • Background sound level, traffic, and more. The two scales cover the 40 ~ 80 dB and 80 ~ 120 dB ranges, with an accuracy of ±3.0 dB. Simple to operate; one selection dial with battery test mode and easy-to-read results. Stable, reliable operation with signal oscillator calibration and a capacitance microphone. Based on the "A" decibel frequency weighting. Comes with a carrying case, instructions and a 9-Volt battery.We do offer combined shipping!