The TECPEL DSL-336A Sound Level Calibrator is ideally designed to provide an extremely high quality performance and functionality. The level calibrator is mainly constructed to meet the users' needs and standards. It provides sveral sound level features and different frequencies to be fitted with different regulations. The high quality calibrator is integrated with a precise and simple-to-use functionality to provide a user-friendly type of tool. It is also built with a low battery indicator capability to view the status of the device's battery level.