★★★★½ 4.5 · 17 Google reviews · 103 E Pennsylvania Blvd
Keystone Alarms holds a 4.5 star average across 17 Google reviews, which places it at #29 for home security & alarms in Philadelphia on our rankings. Positions come from verified public ratings and review volume, refreshed monthly. See the full list on the Home Security & Alarms rankings page.
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