... best quality,cheapest price, light weight,small moderate[Products] DT-85 A mini-noise meter designed to meet safety engineering, health, industrial ... safety, measurement requirements and can control the environment in a variety of sound quality. The noise meter is mainly used ... shutdown: 15 minutes without any operation after. Power to provide: a 9 V battery, 006P or IEC 6F22 or NEDA 1604 ...