ac powered smoke detector 4 pack

China 4-pack 4-Pack Hardwired Smoke Detector with Battery Backup OEM manufacturer and export supplier for global retail and property markets. Wanlin Fire provides CE / RoHS certified consumer smoke alarms (WL-series 4-pack platform): photoelectric, CO combo, smart WiFi, wireless interconnect, dual sensor, voice alert, strobe for hearing impaired, mixed senso···