Soundpeats Audio via Amazon offers the Soundpeats M20 In-Ear Earphones for $19.99. Coupon code MQ2EPFTH cuts them to $9.99. Plus, Prime members bag free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $5.06.) That's $90 off list and the lowest total price we could find. They feature a built-in single button microphone and anti-tangle cord.

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