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/slow time weighting:125ms (fast)/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:GN101Material:ABSColor:Black and GreenPower:3 * 1.5V AAA batteries (not included)Measurement range:35dB~135dBResolution:0.1dBAccuracy:Dynamic range:50dBFrequency response range:31.5Hz~8KHzFrequency weighting:weighted networkTemperature measurement range:-20Resolution:0.1Accuracy:Working temperature:-20Storage temperature:-20Product size:approx. 163.6*56*29.7mm / 6.44*2.2*1.17inProduct weight:about 73g / 2.57ozPackaging size:about 27*10*4.5cm / 10.63*3.94*1.77inPackaging weight:about 145g / 5.11ozNote:Please read the user manual before use.Packing list:1 * Digital sound level meter1 * User manual (English)