Kidde Firex HD135F Heat Detector 120V AC 135F Interconnectable Smoke Alarm This item has not been tested and may be missing components, defective, or otherwise non-functional. Please see photos for what you see is what you will receive. Item Specs: Brand: Kidde Model: Firex HD135F Type: Heat Alarm / Heat Detector Power Source: 120V AC hardwired with 9V battery backup (if included) Detection: Fixed 135F temperature sensor Compatibility: Interconnectable with other Kidde/FIREX alarms Application: Residential or commercial fire detection?garage, attic, workshop, utility room, etc. Features: Easy installation, loud alarm, fixed heat sensing, battery backup, test button Mounting: Standard round base (please note, back mounting piece not included?mention in description) Condition: For Parts This is being sold AS-IS. No returns. Please only purchase this if you agree to those terms. SHELF: FA (B) AP