The TA650A Digital Sound Level Meter is a professional handheld noise measurement instrument, also known as a sound level meter, noise tester, decibel meter, sound meter, or noise monitoring device. Equipped with a high-sensitivity condenser microphone, it provides a wide measurement range of 30.0 to 130dB with 0.1dB resolution and ±1.5dB accuracy. The A-weighting measurement mode simulates human hearing characteristics to provide reliable environmental sound level evaluation. The digital noise meter supports FAST and SLOW time weighting modes, allowing accurate measurement of transient noises, machine operating noise, and stable environmental sound levels. With a windscreen microphone cover, data hold function, maximum/minimum value recording, backlit display, and automatic power-off function, the instrument delivers convenient operation for both indoor and outdoor noise inspections. The TA650A handheld sound level meter is widely used in industrial manufacturing, equipment maintenance, occupational health and safety, construction engineering, environmental monitoring, education, commercial facilities, and product quality testing. It is suitable for factory workshop noise measurement, production line noise control, machinery performance evaluation, urban environmental noise monitoring, classroom and hospital sound assessment, building acoustic inspection, and noise testing of electrical appliances, motors, fans, and other products. It is an ideal solution for professional noise control, engineering inspection, and daily field measurement applications.