SMART SENSOR Mini Digital Sound Level Meter LCD Display Noise Meter Noise Measuring Instrument Decibel Tester 30-130dBA ST9604 Item size: 15*5*2.8cm/5.91*1.97*1.1in Digital display: 4 digits 1 * Digital Sound Level Meter Sampling Rate: 2times/s Features: Red back light alarm and sound alarm function. Resolution: 0.1dB Package size: 19.5 * 7.5 * 3.5/7.68*2.95*1.38in Low battery indication, automatic & manual off function. Applications includes: Environmental measurement, law enforcement, work place design, sound level analysis of machinery and engines. Measuring : 30～130dBA Resolution: 0.1°C Equipped with sponge ball for sensor conservation. This instrument is high precision sound level meter, accuracy to ±1.5dB. Frequency Weighting: A Weighting Accuracy: ±2°C Please allow 1-3cm differences due to manual measurement. 1 * User Manual(English) Operating Temperature: 0～40℃ (10%～80%RH) LCD display with backlight, convenient to use at night. Color: Black This digital sound level meter with stable and reliable performance. Brand Name: SMART SENSOR Package list: Specifications: NOTE: Wide measurement from 30dB to 130dBA. Temperature measurement function and Temperature unit selection(℃/℉) Temperature Measuring :-10°C-50°C/14°F-122°F Item weight: 84g/0.19lb Data hold: Maximum and Minimum hold Material: ABS Storage Temperature: -10～60℃ (10%～70%RH) Supply: 3 * AAA Batteries (Not Included) Frequency : 31.5Hz to 8.5Hz This noise meter is designed to test sound level in various environment. It is widely used in noise control, quality control, and, home environment, etc. If don't use it for a long time, please take off the battery to leakage of battery. Please don't store it at high temperature or humidity, high concentration salt or sulfur environment. Data hold function, maximum and minimum value measurement. Package weight: 157g/0.35lb Compact and light, convenient to hold and carry. Accuracy: ±1.5dB (under reference conditions) Item size: 15*5*2.8cm/5.91*1.97*1.1in. Digital display: 4 digits. 1 * Digital Sound Level Meter. Sampling Rate: 2times/s. Features: Red back light alarm and sound alarm function.