1、Small and light, easy to take with you. 2、Wide measurement range from 35dB to 135dB. 3、Designed to monitor sound quality in various environment, reliable measurement results. 4、Data hold, maximum and minimum value display. 5、Widely used in noise control engineering, quality control, health and treatment, home environment monitoring, etc. Feature: Auto power off to save power. Small and light, easy to take with you. Wide measurement range from 35dB to 135dB. Designed to monitor sound quality in various environment, reliable measurement results. Data hold, maximum and minimum value display. Widely used in noise control engineering, quality control, health and treatment, home environment monitoring, etc. Specification: Material: Plastic + electronic components Color: Red + Grey Measurement range: 35db-135db Frequency response: 31.5Hz-8KHz, Noise Accuracy: + - 2.0db Data Hold HOLD Shows "HOLD": Yes Auto Power Off: Yes The screen is locked: Yes LCD Backlight: Yes Fast, slow time weighted selection: Yes Overrange tips: Yes Maximum, minimum measurement: Yes Battery: 3 x 1.5V AAA battery (Not included the battery) Size: (L) x (W) x (H) 154 x 53 x 25mm / 6.06" x 2.09" x 0.98"(appr.) Package included: 1 x Mini Sound Lever Meter (Not included the battery) Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.