In the audio titled "Mr. Ren's Lesson 2", a male voice resonates, presumably Mr. Ren's. His voice is firm and authoritative yet comforting, embodying the persona of a seasoned educator guiding his students. The background is alive with quiet rustling noises, possibly the shuffling of papers or books, indicating a classroom environment. Throughout the audio, Mr. Ren's voice remains steady and clear, punctuated with pauses for emphasis or to allow the listeners to absorb the information, before moving on to the next point. His tone suggests his dedication to imparting knowledge and his commitment to the listener's understanding of the subject matter.