Recently, I got Soundpeats Air4 and Air4 Pro. I compared these earphones. This is just my personal opinion.
Noise cancelling of Air4 has little effect to remove sound of traffic and speech from outside the windows of my room.
But Air4 Pro is very effective. I feel my heartbeat sound come from ear holes are bigger than these noise while wearing it. It also removes most sound of computer fans and my small kitchen vent hood fans.
I like strong cancelling of Pro and its ear tips feel soft and fit my ears. So I use Pro for daily life from now.
I wrote above sentences to train English writing skill.
ChatGPT 3.5 predicted that I have a TOEIC score of about 600-800.
Japanese version: Soundpeats Air4とAir4 Proを買った - nonameのノート
