This is a smoke alarm that produces a powerful,
low pitch/frequency  alert. This is what people with a typical high
frequency hearing loss need.  250-300 Hz at 87 dB (near middle c).
Detects smoke particles and combustion fumes as per typical retail detectors

Uses onboard, 6 inch speaker for strong, heavy sound.

No wiring or expert installation needed.

Specifications:

• Frequency: 250 - 300 hz at > 87dB (carries better than standard alarms)
  
• Dimensions: Chassis: 6.5" x 8" x 2" deep
  
• Weight: 3 lbs
  
• Mounting: #6 screw (included)
  
• Power: Uses 6 alkaline AA batteries (not included)
  
• Battery life: 1 year
  
• Power consumption 1000 milliamps in alarm mode (9 watts)
  
• Audio source: Power F.E.T. and 6 inch dynamic speaker
  
• Detection method: Ionization chamber (Industry standard)
  
• Low battery alert: Sounds low-frequency chirp every 30 seconds
  

Manufactured in compliance with US NRC safety criteria in 10 CRF 32.27

Three year limited warranty.