Features: - Compact and ultra-light:Humanized design, small size, light weight, easy to carry. - High-precision sensor:high sensitivity, high precision, high response speed. - VA color screen:HD LCD display with backlight allows you to read the value clearly even in a dark environment. - Wide frequency range:31.5Hz-8KHz. - Fast or slow time weighting:125ms (fast) or 1m (slow). - - Low battery reminder:It can remind you to replace the battery in time to prevent it from being shut down due to low power. - Automatic shutdown:No operation within 15 minutes, energy saving. - Diversified functions:sound level measurement, ambient temperature measurement, maximum and minimum measurement, data retention, over-range indication. - Wide application:Applicable to environmental measurement, law enforcement requirements, design measurement, sound level analysis machines and engines. Specifications: Model:GN101 Material:ABS Color:Black and Green Power:3 x 1.5V AAA batteries (not included) Measurement range:35dB-135dB Resolution:0.1dB Accuracy: Dynamic range:50dB Frequency response range:31.5Hz-8KHz Frequency weighting:weighted network Temperature measurement range:-20 Resolution:0.1 Accuracy: Working temperature:-20 Storage temperature:-20 Product size:approx. 163.6x56x29.7mm or 6.44x2.2x1.17in Product weight:about 73g or 2.57oz Packaging size:about 27x10x4.5cm or 10.63x3.94x1.77in Packaging weight:about 145g or 5.11oz Note: Please read the user manual before use. Packing list: 1 x Digital sound level meter 1 x User manual (English) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.