Low Frequency Fire Alarm for the Hard of Hearing
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THE LIFETONE HL™ AT A GLANCE

• Loud 85 dBA low-pitched 520 Hz square wave alarm,
   scientifically proven most effective for awakening everyone

• Powerful bed shaker reinforces the 520 Hz audible alarm

• Fire protection at the bedside, where and when you need it most

• Works with all conventional UL 217-compliant smoke alarms

• No installation or wiring needed

• 7-day battery backup

• Your reliable daily alarm clock