Stand Alone Photoelectric Smoke Detector YUNYANG YSD-H02 – Adopt the voice broadcast which the seniors and children are easy to hear and understand. – Battery last longer, uses original Panasonic battery, long battery life with 10 years. – Very suitable for detached houses. – Built-in automatically test function which can instantly know the host is abnormal. – Equipped with 360º blinking LED to indicate fire alert. – Easy to […]