Kidde Smoke & Carbon Monoxide Alarm - 3 Pack

Kidde 120 V AC Talking Smoke & Carbon Monoxide Alarm with 10-Year Sealed Battery Backup, Model P4010ACSCO-C - two pack never opened, one opened but never used. Expire in 2034. 3 packs in total. They do communicate with each other. Paid over 100$ for each.