https://www.amazon.com/dp/B001CCINO0/ref=cm_sw_r_cp_apap_RQLaqEQw63gsM

This is the one I purchased, amazing for adventitious lung sounds, as well as heart sounds. No regrets 👌

https://www.amazon.com/3M-Littmann-Lightweight-Stethoscope-2450/dp/B001CCINO0/ref=asc_df_B001CCINO0/?tag=hyprod-20&linkCode=df0&hvadid=198094174744&hvpos=1o3&hvnetw=g&hvrand=17672357011562347434&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9033313&hvtargid=pla-318098736620&psc=1

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https://www.amazon.com/dp/B078RVPV9H/ref=sspa_dk_detail_1?pd_rd_i=B078RVPV9H&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFORjVUSjZXNkFEOUsmZW5jcnlwdGVkSWQ9QTAxNzUyMjYyQzFZU01VUDJPM1VKJmVuY3J5cHRlZEFkSWQ9QTA0Mjc1MjExS0RTVEcySUMyUjBNJndpZGdldE5hbWU9c3BfZGV0YWlsJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ&th=1

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TBH, anything works short of the garbage $5 isolation stethoscopes unless you have hearing loss. Then, the quality of the stethoscope is very important.