Etymotic Research ER200 Personal Noise Dosimeter

Hearing loss from loud sound affects millions of people. Noise-induced hearing loss is preventable, but most people don't know how long they can listen to loud sound without risking hearing damage. A single noise exposure may not result in hearing loss, but permanent damage to the inner ear from noise adds up over time. The accumulation of too much noise day by day, year after year, is the determining factor in hearing loss risk. ER200 Personal Noise Dosimeter, 70 to 130 dB SPL dB Range, Frequency Range 100 Hz to 15 KHz, A Frequency Weighting, Accuracy +/-2.5dB, Display Green, Yellow, Red LEDs, Slow Response Time, Microphone Type Electret, Microphone Size Integral, Standards ANSI S1.25-1991, Criteria Levels 85 dB SPL, 3dB Exchange, Records Up To 16 Hours Run Length, Threshold Level 75 dB SPL, Operating Temp. Range -10 Degrees C to 45 Degrees C (14 Degrees F to 113 Degrees F), AAAA Battery Type.