Hardwired and 1-Year Battery Backup Smoke Detector with Photoelectric Sensor

Universal Security Instruments Hardwired & 1-Year Battery Backup Smoke Detector

Hardwired and 1-Year Battery Backup Smoke and fire alarm

Universal Security Instruments Hardwired & 1-Year Battery Backup Smoke Detector

USI Hardwired and 1-Year Battery Backup Smoke Detector with Photoelectric Sensor

10-Year Battery Powered Smoke and Fire Detector with Ionization Sensor

Universal Security Instruments Hardwired Battery Backup Smoke Detector