Enclosed design provides protection and portability, enabling flexible integration into existing setups and workflows. frequency accuracy: at higher frequencies the inputoutput deviation is under 1 percent, delivering consistent and reliable performance. Frequency dependent sound: the speaker output is driven by the signal frequency; low frequency components are inaudible to most listeners, and audible sound appears as the frequency enters the hearing range. Suitable for enthusiasts and professionals who require dependable frequency modulation in their projects or experiments. Plugandplay operation: easy setup with no additional configuration needed. Use scenarios In a electronics lab or prototyping workspace to test frequency modulation behavior and verify signal integrity within audio or RFrelated projects. In DIY audio or signalgeneration projects where quick deployment and portability are important for ongoing development. In classroom or demonstration environments to illustrate how frequency affects audible output and the relationship between input and output.