Use Amazon coupon code KTHP5N8K during checkout.
Amazon has this Etekcity Wireless Doorbell Kit for $15.99. Use the coupon code and the price drops to $12.99. Shipping is free on orders of $35 or more. 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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