USA smoke alarm replacement

elementary school smoke detector direct from Wanlin Fire Protection — 12-year factory experience, WL-SM608 4G standalone smoke detector certified CCCF/GB 20517-2006/CE/UL 217/EN 14604. Key specs: Dual Light Path Photoelectric + 4G Cat.1 + Cloud Platform + Complete Installation Kit + 10-Year Design, 4G LTE Cat.1 + Cloud Platform + Mobile APP + Complete Kit (D···

dual barrier smoke detector direct from Wanlin Fire Protection — 12-year factory experience, WL-SM606 4G standalone smoke detector certified CCCF/GB 20517-2006/CE/UL 217/EN 14604. Key specs: Dual Wavelength Photoelectric + Infrared + Blue LED + 4G Cat.1 + Multi-Criteria Algorithm, 4G LTE Cat.1 + Cloud Platform + Multi-Criteria Detection + SMS/Push/Email + Re···

silent mode smoke alarm direct from Wanlin Fire Protection — 12-year factory experience, WL-SM605 4G standalone smoke detector certified CCCF/GB 20517-2006/CE/UL 217/EN 14604. Key specs: Dual Light Path Photoelectric + LoRaWAN Long Range + Maze Sensor + Low Power, LoRaWAN + IoT Gateway + Cloud Platform + Long Range (up to 15km) + Battery Optimized. Dual ligh···