Etekcity via Amazon offers the Etekcity Wireless Doorbell Kit, model no. 679113375840, for $15.99. Coupon code KTHP5N8K cuts it to $12.99. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.94.) That's tied with our mention from a month ago as the lowest total price we've seen. (It's a current best by $7.) It features a wireless range of up to 1,000 feet, 52 chime options with four volume settings, and flashing LED alert.

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