ECmallUS via Amazon offers the Meterk LCD Digital Sound Level Meter for $21.97. Coupon code "3TTBPK8F" cuts that to $15.16. Plus, Prime members bag free shipping. Excluding the below mention, that's the lowest price we could find now by $5, although we saw it for $3 less in September. It features a backlit LCD, electronic condenser microphone with sponge windscreen, 30 to 130 dBA measuring range, data hold, and auto shut-off. Deal ends December 12.

Don't mind waiting for your deal? Domecool via eBay offers it for $15.08 $14.92 with free shipping. This deal ends today. (This item ships from China and requires two to five weeks for delivery.