â·ÃÊͺ¶ÒÁÃÒ¤Ò testo 816 sound level meter incl. microphone, wind protection cap, battery, stereo jack 3.5 mm in system case with batteries testo 816 sound level meter incl. microphone, wind protection cap, battery, stereo jack 3.5 mm in system case with batteries Compared to testo 815, the larger model has additional features which make it ideal for assessors, workplace measurements and for measuring industrial and environmental noise. Easy to adjust (adjustment screwdriver included) Frequency weighting to characteristic A and C Maximum and minimum memory Built-in tripod knuckle screw (1/4 inch) Switchable time weighting Fast / Slow Automatic range switchover Backlit display Mains unit connection BarGraph display AC output to connection from recorders and amplifiers DC output with 10 mV/dB to connect recorders or dataloggers testo 816: Time weighting Section measurement range Frequency weighting Current reading Automatic range switchover Backlit display Mains unit connection Bar graph display AC output for connecting recorders and amplifiers DC output with 10 mV/dB for connecting recorders or data loggers Storage temperature -10 to +60 °C Operating temperature 0 to +40 °C Battery type 9V block battery Battery life 50 h Weight 315 g Dimensions 309 x 68 x 50 mm Probe type Sound Meas. Range +30 to +130 dB Accuracy ±1.0 dB Resolution 0.1 dB