Item Type: Sound Level Meter Material: ABS Battery: AAA Battery x 3 ( Shipped Without Battery ) Noise Measurement Range: 30-130dBA Frequency Response: 30Hz-8KHz Dynamic Range: 50dB Temperature Range: -20.0-60.0 Humidity Range: 0.0%-99.9%RH 1Multifunctional: This sound level meter is multifunctional with sound level, temperature and humidity measurement functions to meet the needs of most consumers. 2Large Backlight LCD Screen: This sound level meter features a large, clear backlight LCD display that clearly shows measurements. With backlight on, readings are easily taken at night, reducing eye damage. 3Wide Application: This sound leveler has a very wide range of applications and is widely used for individuals, families, businesses, studies, industries and so on. 4Excellent ABS Material: This sound leveler is made of excellent ABS material, which is strong and wear resistant, not easy to be damaged, and has a long service life. 5Compact And Portable: This sound leveler is small in size and light in weight, which makes it very convenient to carry around with you. 1 x Sound Level Meter 1 x Manual 1 x Storage Bag