$7.20 for Universal Security Instruments Smoke & Fire Alarm

Walmart has the Universal Security Instruments Hardwire Smoke & Fire Alarm with a 10-year battery backup for $7.20. This is a very low price for a hardwired smoke and fire alarm with a decade-long battery backup, which are typically priced much higher. The discount from most retail prices makes this a notably good deal, especially considering the included battery life and the essential safety function. Redeeming is straightforward — simply purchase online or in-store while supplies last.