Electricity reduction device: made of slow material to ensure safety, especially for longterm wear. Noise reduction device: intelligent noise reduction and enjoy sound quality. Car noise filter: without distorting the sound quality of any frequency, you can listen to and appreciate the full range of melody. Noise isolator: for sleep, study and general hearing protection from all types of loud activity. Key benefits Safe, long term wear: construction uses slow material to support safe, comfortable use over extended periods. Clearer listening: intelligent noise reduction preserves sound quality across frequencies for a more natural, undistorted listening experience. Full range audio: car noise filter reduces ambient noise without distorting any frequency, so melodies and details remain intact. Flexible hearing protection: noise isolator provides effective protection from loud environments, useful for sleep, study and everyday noise. Specifications and attributes (as described) Function: electricity reduction, noise reduction, car noise filtering, and general noise isolation. Material: slow material used for safety during longterm wear. Performance: intelligent noise reduction with emphasis on preserving sound quality and full frequency range. Compatibility: not specified in the description. Size: not specified in the description. Practical applications Sleep and rest: use the noise isolator to minimize daytime noise and improve focus on relaxation or sleep without removing awareness of essential sounds. Study or work in noisy environments: apply the noise reduction device to achieve clearer concentration and more comfortable listening while preserving audio quality. In the car or during travel: use the car noise filter to enjoy music or podcasts without distortion, maintaining fidelity across all frequencies. General hearing protection: suitable for protecting hearing in loud activities while still allowing access to important audio cues.