SPL Sound Pressure Level Meter w/ 1/2-in Electret condenser microphone Accuracy: +/-2 dB w/Resoluti

Today, there is a need to know just how loud your surroundings really are. The CHECK MATES are inexpensive tools everybody should own. Windscreen and battery are included with each of the CHECK MATE models. The CHECK MATE series SPL Sound Pressure Level meters, first introduced in early 2003, allow musicians, sound contractors, and others to measure SPL in decibels dB. A decibel is defined as the unit for measuring relative loudness of a sound. We have expanded our line from one CHECK MATE SPL Meter to four products in the category. We have sold thousands of units to working musicians, DJs, police departments, sound contractors, racetracks, etc... Mini Size Low Cost High Performance MAX Function Level Range Display Resolution 0.5dB Microphone 1/2-in Electret Condenser Accuracy under reference conditions 94dB 1kHz +/-2dB Level Range: 1: 40 - 70dB; 2: 60 - 90dB; 3: 80 - 110dB; 4: 100 - 130dB; Frequency Range 125Hz to 8kHz Frequency Weighting A/C Time Weighting Fast, Slow Dynamic Range 30dB Display Liquid Crystal Display Digital Display Digits: 4 Resolution: 0.5dB Update: 0.5 sec. Alarm Function Over, Under Power Supplied By One 9V battery included, 006P or IEC 6F22 or NEDA 1604 Battery Life Approximately 110 Hours Alkaline Operation Temp. 0 Degrees C to 40 Degrees C 32 DegreesF to 104 Degrees F <80% R.H. Storage Temp. -10 Degrees C to 60 Degrees C 14 Degrees F to 140 Degrees F <70% R.H. Dimensions 9.1-in x 2.1-in x 1.3-in 232 x 54 x 34 mm HxWxD Weight with batteries 6 oz 170 g