First Alert SMI100-AC, 9120B Replacement Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack RiRe the massaging heads covered with

the massaging heads covered with silicon rubber which are softer than metal heads

Improves gum health up to 100 percentage versus a manual toothbrush

wear-resistant materials for the cylinder and piston

Added Support bars: Four support bars are inserted instead of 2 provide stronger support and corrective ability

From healthy to indulgent

First Alert SMI100-AC, 9120B Replacement Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack RiRe the massaging heads covered withBrand: FIRST ALERT Color: White Features: First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency. Through early warning interconnect, when one alarm sounds, all compatible alarms will sound Battery backup provides continuous protection during power outages Alarm indicator visually identifies the unit that