Hendun Upgraded Power Failure Alarm, GFCI Circuit Failed Dector Alerter, Smart Power Outage Reminder for Freezer in Garage, Monitor Power Cut of CPAP, Breaker and GFI/GFCI Trip Alarm hnfpa is up for auction in Tools & Home Improvement. The current bid is $3.00, 82% below the $16.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.