At firealarm.com, we’ve extensively tested the Apollo SA5050-350APO, and it’s been a significant upgrade over the older 55000-886APO model. The SA5050-350APO offers enhanced sensitivity and reliability, making it a solid choice for modern fire alarm systems. Its improved features ensure quicker detection and response to potential fire hazards, ultimately enhancing overall safety. We highly recommend considering the SA5050-350APO for your fire alarm system upgrade needs.