CSHope via Amazon offers its CSHope Waterproof Wireless Doorbell for $15.99. Coupon code "CSHOPEWD" knocks it to $12.31. With free shipping for Prime members, that's a buck under our September mention and the lowest price we could find today by $13. It features a 1,000-foot wireless transmitting distance, 36 ringtones, 4-level volume, and LED. Deal ends January 4, 2018.