heat alarm

Source 2 in 1 Smoke Heat Alarm directly from Wanlin Fire, a leading Chinese manufacturer of NB-IoT Smart Smoke Detector. Product highlights: NB-IoT ultra-low-power, 8-year battery life, daily heartbea

Source Smoke Heat Combined Alarm directly from Wanlin Fire, a leading Chinese manufacturer of Wireless Interconnected Smoke Alarm. Product highlights: RF 433MHz mesh, one triggers all, 100m distance,