Thousandshores Inc via Amazon offers the Dr.meter Hearing Protection Earmuffs for $26.99. Coupon code "55QCGYMR" cuts it to $18. With free shipping, that's $9 off and the lowest price we could find. They feature built-in directional microphones and auto shut down speakers. Deal ends June 30.

Update: The price has dropped to $17.99. The coupon has expired.