The TA651B Digital Sound Level Meter is a professional portable noise measurement instrument designed for accurate environmental sound level testing and decibel measurement. Equipped with a high-sensitivity 1/2-inch condenser microphone, this digital noise meter provides reliable dBA measurements for various acoustic environments. The sound level tester supports FAST and SLOW time weighting modes, allowing users to capture both rapidly changing and stable noise signals. It integrates multiple functions including noise measurement, ambient temperature and humidity monitoring, high/low alarm settings, data hold, maximum/minimum/average value recording, analog bar display, alarm backlight indication and low battery warning. The TA651B noise meter is widely used in industrial manufacturing, factory workshops, machinery maintenance, construction sites, building inspection, environmental monitoring, property management, residential communities, offices, classrooms, commercial facilities, cinemas, entertainment venues, server rooms and quality inspection laboratories. With its compact design, easy operation and reliable measurement performance, the TA651B digital sound level meter provides an effective solution for noise assessment, workplace safety management, equipment noise analysis and noise reduction evaluation.