Lutron sound level meter has 3 range selector i.e. 30 to 80 db, 50 to 100 db, 80 to 130 db with 50 db on each step over/under range indicating.Its measurement range is a weighting- 3 ranges, 30 to 130 db and c weighting- 3 ranges, 30 to 130 db features:Large lcd display, easy to read, time weighting and frequency weighting meet, iec 61672 type 2, external calibration vr, condenser microphone for high accuracy and long-term stability, max. Hold function for stored the maximum value, warning indicator for over and under load, lcd display for low power consumption and clear read-out even in bright ambient light condition, used the durable, long-lasting components, including a strong, light weight abs-plastic housing case, pocket and light weight design allow one hand operation.
Resolution: 0.1 db
Accuracy: 1 k hz – Plus and minus 1.5 db ( after cal.) Frequency: 31.5 to 8,000 hz
Operating temperature: 0 to 50deg, C operating humidity: Less than 80 percent r.H
Power supply: 006p dc 9v battery (heavy duty type) or dc 9v adapter input